Arm backend: Centralize quantized guard in Arm passes

[Sebastian-Larsson]

Add an ArmPass helper to detect fully quantized meta and reuse it across decomposition passes to reduce duplication.

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

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❌ 6 New Failures

As of commit 55aae04 with merge base 7b843e4 ():

NEW FAILURES - The following jobs have failed:

• pull / test-openvino-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 59701a7d55ec77d6b8f676ca0357603d79c59082aa9ee4f482eb8bf99bee2d56 /exec failed with exit code 1
• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t f0cb72251d21e44dee7f6d58fa9bd639d6ac512b85d01277a8f4bec8a0dffe00 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t cbda202d67f17b62d8b94e167a661d25197cdb59e057aa114d2b6d81904b101d /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 7daa12e4b2c38d77851d4705c19b3a24622391341c7b3fe33ae545c3f3e0dd4a /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t 9434eda8be9c01edc79d9c6e00b3c265f5f304ad8e2f594a47489db083a05201 /exec failed with exit code 1
• trunk / test-arm-backend-vkml (test_pytest_ops_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t 7c1fd5302e170361145131b8fe1a6934144318f9fd28e0fd4fe567cfbe88777b /exec failed with exit code 1

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