NXP backend: Add support for aten.avg_pool1d.default.

[MartinPavella]

Summary

During the conversion from aten dialect to edge dialect, ExecuTorch replaces the avg_pool1d with avg_pool_2d and adds an aten,unsqueeze before, to introduce the 4th dimension of size 1, and an aten.squeeze is added after to remove it. The avg_pool1d is then supported by the existing AvgPool2DConverter.

Test plan

Unit-tests provided.

cc @robert-kalmar @JakeStevens @digantdesai

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17412

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❌ 2 New Failures

As of commit ce9a9ed with merge base c09db81 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 24affaed87da890c0f11e6983847cdd4c0d1480e5c9684b2b89aa996648da341 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 69681cdc9fce7f0e2bf0319f6def5b8d68eda3e1cafbb9ff7b4be10450535a56 /exec failed with exit code 1

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[MartinPavella]

The changes are based on another PR (#16540) so only the last commit is relevant.