Remove dep on torchtune for weight conversion

[lucylq]

Summary

Remove dep on torchtune for weight conversion.

After this, I think torchtune is only used for model definitions in

• phi-3-mini-lora
• llama3_2_vision
  (these can't be removed)

And a few other ckpt conversions via FullModelHFCheckpointer (this can be removed)

Test plan

CI

[pytorch-bot]

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❌ 36 New Failures, 14 Unrelated Failures

As of commit 68b6eb2 with merge base 5ed69ef ():

NEW FAILURES - The following jobs have failed:

• pull / test-binary-size-linux-gcc / linux-job (gh)
  RuntimeError: Command docker exec -t 613e5cec511c8b9978886a1f24fe6d0e1795211b3419a8ce70ef5c1f2c1eb7a6 /exec failed with exit code 1
• pull / test-parakeet-xnnpack-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 10b811a9465fb1d79e2e35dbee5a4428a3d92305750c6241d1f7153aeb5fab90 /exec failed with exit code 1
• pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 198a08d8cf8b65ad95c33eebdb55b269d16eaf83cee1a2cadf0f4ff537dd362f /exec failed with exit code 1
• pull / unittest-arm-backend-with-no-deps (test_pytest_ops_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 83a68154e02eeb8f04ccc4f29eaa676eee9ddd05a1ba5933b521a77918f54ecf /exec failed with exit code 1
• Test CUDA Builds / check-all-cuda-builds (gh)
  Process completed with exit code 1.
• Test CUDA Builds / export-model-cuda-artifact (google, gemma-3-4b-it, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t ca20bfad9995fa0a1b16b8bdbeb484097b950aec373e75d5bc3fefbcf3b29be1 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (google, gemma-3-4b-it, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t a864ea51ff2a05985449c3c1d93470dac5c3d824126af81eb6272c9c992637bc /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (mistralai, Voxtral-Mini-3B-2507, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t 3c4c15687d2404e155caf09048ab55372ec02749deec919d614aa540607354bc /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 531ee4f6a9780df835b6a8ec115d653d6cee8dd38ccf40e09a2e1bb5da97479c /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 8934fd0744f44a794dda9ae2917996b494950617ff28fbee2f9846f5d10b8973 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (nvidia, parakeet-tdt, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t 7aa971aaeda6bdb6f04dbd9c4764ae057a451911696f17f6963bdaa73eae29f8 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (nvidia, parakeet-tdt, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 387a7b343382166bf8443afb6fbcb271d547ff1f3a32d76d7fb1a9c305a5a0c2 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (nvidia, parakeet-tdt, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 6de08af6e7def45ab5eb3836736265b780d4bd211e7f155b80a442cd178d9d66 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-large-v3-turbo, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t ab1b9aec2ec1eba85bb8686f1d31c783640aed4618b564ad151cd32383c794c3 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-large-v3-turbo, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 3411e9d6185c9e966fb609c518f8941510d13cbc95f39ea57b9281a320ceadf5 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-large-v3-turbo, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 521bb632de87143ce1b0146646e8d073a0fd371bf4cd16445694fcdcccbc372a /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-small, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t 7881a5739bb33b0a89069d2d396f50527ea0fb9efcea73966e58b55684493afe /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-small, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 4cdc36fbc4ea4428c097d9aad2b06c6f6c3cf4c48d250e8ff1c19e0688b765b7 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-small, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 48d1f091819cee676f7ee38b04958ba843fa873b9867e0da59a585ab7498d73d /exec failed with exit code 1
• Test CUDA Builds / test-executorch-cuda-build-12.6 / linux-job (gh)
  RuntimeError: Command docker exec -t 8130d2dd9cea33716501dbc0e4d9c992a1608a74eb492e44abc5b7ed03e2c33a /exec failed with exit code 1
• Test CUDA Builds / test-executorch-cuda-build-12.8 / linux-job (gh)
  RuntimeError: Command docker exec -t 762a1a7bba7f94ed5f052f72ab111f28426af187c434570b502716556aa90e3c /exec failed with exit code 1
• Test CUDA Builds / test-executorch-cuda-build-12.9 / linux-job (gh)
  RuntimeError: Command docker exec -t a3202b84eadfaf7d8924a90b779b090337eab15fc65c9797a9d6d496932187aa /exec failed with exit code 1
• Test CUDA Builds / test-executorch-cuda-build-13.0 / linux-job (gh)
  RuntimeError: Command docker exec -t ed12c1675203ec1fa923e7f188412d7da86221b7b9dc3862c26bc7381a4f40c6 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (add_mul) / linux-job (gh)
  RuntimeError: Command docker exec -t 88242ff7d5143b127fe06e15ff474291199b9a3be534535247f8b1e0f7938b62 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (add) / linux-job (gh)
  RuntimeError: Command docker exec -t 9eafb75949b4607a0c9525f7eec582d715723686fb9ee346868e1f612710211a /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (conv1d) / linux-job (gh)
  RuntimeError: Command docker exec -t 3104d56f636bcf1ccc592e46e69797a07fc0490e67534d21d0a98a4ec5e2f7f7 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (linear) / linux-job (gh)
  RuntimeError: Command docker exec -t 855b2ea5dba8bc960f80edeae93e7e2c68e9e083d1ca69f6f0f1df8c0f2d8573 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (mv2) / linux-job (gh)
  RuntimeError: Command docker exec -t 43c648243459f191ac6035ac492f8a6e4348f1f89c0a9f72d6fdd31007fd5dba /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (mv3) / linux-job (gh)
  RuntimeError: Command docker exec -t 6af0c08571cb160456e14d6f9fb746758b09fb536688c135a5f3892f4f174995 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (resnet18) / linux-job (gh)
  RuntimeError: Command docker exec -t b95a9f7394f55fcc87398bb10b0b3794ffa134787cc55a42fbb6d8aad5e83154 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (sdpa) / linux-job (gh)
  RuntimeError: Command docker exec -t da82653aa0e90772071c6d8565dc4570181d1f2bc7bd940604dfec347f3b8683 /exec failed with exit code 1
• Test CUDA Builds / unittest-cuda / linux-job (gh)
  RuntimeError: Command docker exec -t 2ca66c2f3b508e33ba44d06001257413b1ab642140d768329fe4700006827828 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (mistralai, Voxtral-Mini-3B-2507, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t 3c686df7ff4fa2214457d2219c92f2eca71ffd451fe1e272862a5421e4d8770e /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 219672bad06fa3e53c7bd376b8aa36a8a4414c445d7887e503d7f00e4684a7a3 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (nvidia, parakeet-tdt, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t a1beb75b85d6769eb379085f3dcf5ae3a22f8dc47170b99d18bcffe8053830d9 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (nvidia, parakeet-tdt, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t de1d35794e2b721b018478af1d14fee62d65aa2e77540fdbe56231281ce96cd8 /exec failed with exit code 1

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-coreml-bc-macos (macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / test-coreml-bc-macos (macos-m2-stable) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest / windows / windows-job (gh) (trunk failure)
  Process completed with exit code 1.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  Process completed with exit code 1.
• Test Metal Backend / export-model-metal-artifact (mistralai, Voxtral-Mini-3B-2507, non-quantized) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-metal) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (nvidia, parakeet-tdt, non-quantized) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (nvidia, parakeet-tdt, quantized-int4-metal) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (openai, whisper-large-v3-turbo, non-quantized) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (openai, whisper-large-v3-turbo, quantized-int4-metal) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (openai, whisper-small, non-quantized) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (openai, whisper-small, quantized-int4-metal) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / test-executorch-metal-build / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Test Metal Backend / test-metal-backend-modules / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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