[Backend Tester] Skip inf and nan operator tests

[GregoryComer]

Skip tests that validate inf and nan edge cases. In hindsight, it's not reasonable to validate these on backends, with varying quantization and precision. I've marked them as skip to allow for manually running as they might have some conceptual value to backend authors.

[GregoryComer]

Stack from ghstack (oldest at bottom):

• [Backend Tester] Increase linux runner size #14200
• [Backend Tester] Add ARM TOSA flow #14190
• [Backend Tester] Skip tests with undelegated conv3d ops #14185
• [Backend Tester] Refactor workflows into one workflow per backend #14137
• [Backend Tester] Add flow-specific skipped tests, skip argmin/max on Core ML due to native crashes, float16/64 on Vulkan #13992
• [Backend Tester] Add error message field to CSV report #13991
• -> [Backend Tester] Skip inf and nan operator tests #13990
• [Backend Tester] Skip in-place activation tests due to lack of support in ET #13989

[pytorch-bot]

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❌ 1 Cancelled Job, 3 Pending, 3 Unrelated Failures

As of commit 274a9b4 with merge base 6d8583d ():

CANCELLED JOB - The following job was cancelled. Please retry:

• pull / test-moshi-linux / linux-job (gh)
  ##[error]The operation was canceled.

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-binary-size-linux-gcc / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / test-openvino-linux / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / test-setup-linux-gcc / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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