NXP backend: Enable initial unit tests workflow (#11396)

[robert-kalmar]

Summary

Initial workflow definition for running unit tests for Neutron (NXP) backend.

Follow up for the #11109, our IT updated the eIQ PyPI, so the neutron-converter python package shall be reachable using the executorch's self-hosted agents too.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/11756

• 📄 Preview Python docs built from this PR

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❌ 1 New Failure, 3 Unrelated Failures

As of commit eeb84b3 with merge base 6f44a79 ():

NEW FAILURE - The following job has failed:

• trunk / test-arm-backend (test_pytest_models_ethosu_fvp) / linux-job (gh)
  RuntimeError: Command docker exec -t a66494d312566a4523c0c3add25419984a643b19ffc271b85a2b60242ac97384 /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 / linux / linux-job (gh) (trunk failure)
  examples/models/llama/tests/test_ring_attention.py::TestRingAttention::test_sliding_window_attention_custom
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
  examples/models/llama/tests/test_ring_attention.py::TestRingAttention::test_sliding_window_attention_custom
• trunk / unittest-release / linux / linux-job (gh) (trunk failure)
  examples/models/llama/tests/test_ring_attention.py::TestRingAttention::test_sliding_window_attention_custom

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[robert-kalmar]

Note: The failing tests fails on the main branch too - https://hud.pytorch.org/pytorch/executorch/commit/6f44a7930101556357cd467857fc3650af4616f7 :

• pull / unittest / linux / linux-job
• pull / unittest-editable / linux / linux-job
• trunk / unittest-release / linux / linux-job

The trunk / test-arm-backend (test_pytest_models_ethosu_fvp) / linux-job fails to download pybind11: https://github.com/pytorch/executorch/actions/runs/15850429779/job/44682285629?pr=11756#step:15:14004

They are not related to this PR.

[robert-kalmar]

@JacobSzwejbka @mergennachin our IT managed to set the eIQ PyPI repository (eiq.nxp.com/repository) in to work with the self-hoster runners the ExecuTorch is using for testing. The trunk/unittest-nxp-neutron job.
Please review and if OK, merge.

CC @digantdesai, @JakeStevens

[digantdesai]

LGTM.
I guess this got reverted when I was out?

[robert-kalmar]

LGTM. I guess this got reverted when I was out?

Yes, it is exactly the same commit.

[digantdesai]

LGTM, seems like the unit-test failures are not related.