Add a whisper runner that works with optimum execturoch

[larryliu0820]

Summary

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Test plan

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15345

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❌ 12 New Failures, 1 Unrelated Failure

As of commit 427afa6 with merge base 7215b88 ():

NEW FAILURES - The following jobs have failed:

• pull / unittest / linux / linux-job (gh)
  extension/llm/custom_ops/test_quantized_sdpa.py::SDPATestForCustomQuantizedSDPA::test_sdpa_with_cache_mqa
• pull / unittest / macos / macos-job (gh)
  extension/llm/custom_ops/test_update_cache.py::UpdateQuantizedKVCacheTest::test_batched_update_with_indices
• pull / unittest / windows / windows-job (gh)
  Process completed with exit code 8.
• pull / unittest-editable / linux / linux-job (gh)
  extension/llm/custom_ops/test_quantized_sdpa.py::SDPATestForCustomQuantizedSDPA::test_sdpa_with_cache_mqa
• pull / unittest-editable / macos / macos-job (gh)
  extension/llm/custom_ops/test_quantized_sdpa.py::SDPATestForCustomQuantizedSDPA::test_sdpa_with_cache_mqa
• pull / unittest-editable / windows / windows-job (gh)
  Process completed with exit code 8.
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t 4d80adf68d8e76003b8deb188402635ff08903d9aa10691b76e63ec362660753 /exec failed with exit code 1
• Test CUDA Builds / test-gemma3-cuda-e2e-non-quantized / linux-job (gh)
  RuntimeError: Command docker exec -t 14ddcd0e9d95eb7480a48be4518eabaa3f40bdc567d9741e6562eaeb2a1e37fc /exec failed with exit code 1
• Test CUDA Builds / test-voxtral-cuda-e2e-non-quantized / linux-job (gh)
  RuntimeError: Command docker exec -t 18c10b8ea8f96873f5ba45ce574358ff10bffcec86ca5e2b4442f036c8b7e2a8 /exec failed with exit code 1
• Test CUDA Builds / test-voxtral-cuda-e2e-quantized-int4-tile-packed / linux-job (gh)
  RuntimeError: Command docker exec -t df9356d67172e3f7d02c3043978b3764b0582fdf39d72e46a8959b7d810f327d /exec failed with exit code 1
• Test CUDA Builds / test-voxtral-cuda-e2e-quantized-int4-weight-only / linux-job (gh)
  RuntimeError: Command docker exec -t 1e5931c68d49959587c8d248d65346c8f0547e6ecc4cf54ab0c2f9569516b624 /exec failed with exit code 1
• Test Metal Backend / test-voxtral-metal-e2e / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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

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

• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh) (trunk failure)

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[github-actions]

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[jackzhxng]

I know this is just a draft at the moment but I think might be worth creating a generic cross attention runner instead