Arm backend: add phi3-mini layer tests

[xingguo01]

• F32/F16 pass
• INT8 xfails partially
• BF16 passes for TOSA, runtime not supported for VGF

cc @digantdesai @SS-JIA @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell

[pytorch-bot]

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❌ 1 Awaiting Approval, 3 New Failures, 4 Unrelated Failures

As of commit b36f2f1 with merge base 0a180ca ():

AWAITING APPROVAL - The following workflow needs approval before CI can run:

• periodic (gh)

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner-mypy (gh)
  >>> Lint for backends/arm/test/models/phi3/test_phi3_layers.py:
• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 75bdf1f86524a4ddb47af4e0c55636a19c6c3e6c0ede7d2bd5c2b834e6f26691 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 0890c4fcb1db6fd424f5cb73df5282dc50c8c430b92092e171511ebefc826fe6 /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 / unittest / macos / macos-job (gh) (trunk failure)
  AttributeError: '_OpNamespace' 'mkldnn' object has no attribute '_is_mkldnn_acl_supported'
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  AttributeError: '_OpNamespace' 'mkldnn' object has no attribute '_is_mkldnn_acl_supported'
• trunk / test-mcu-cortex-m-backend / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• trunk / unittest-release / macos / macos-job (gh) (trunk failure)
  AttributeError: '_OpNamespace' 'mkldnn' object has no attribute '_is_mkldnn_acl_supported'

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[xingguo01]

@pytorchbot label "partner: arm"

[xingguo01]

@pytorchbot label "release notes: arm"

[xingguo01]

@pytorchbot label "ciflow/trunk"

[pytorch-bot]

To add these label(s) (ciflow/trunk) to the PR, please first approve the workflows that are awaiting approval (scroll to the bottom of this page).

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