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

[MartinPavella]

Summary

This PR adds support for the aten.clamp.default operator no NXP backend.

Test plan

Unit-tests provided.

cc @robert-kalmar @JakeStevens @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17327

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• Lint/Mac jobs intermittently fail

❌ 3 New Failures

As of commit c90bab3 with merge base 874a13a ():

NEW FAILURES - The following jobs have failed:

• pull / test-moshi-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 228ddac479b59654f11a5c8b363ad641317330d35119da1fc64d4b004d2e035f /exec failed with exit code 1
• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 27bb7241d858f57ded43d67d87800a1ed833c0c19c8ee92af88ea84a40e10205 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 77252e3fafc5698015a7320a0de8fe40f7f1629325f9398e7b442ac170b0f462 /exec failed with exit code 1

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[MartinPavella]

Internal build: https://bamboo3.sw.nxp.com/browse/MLTECE-EXIGH76-1