NXP Backend: Add padd to remove unnecessary Quantize/Dequantize nodes.

[MartinPavella]

Summary

This PR adds an edge dialect pre-processing pass to remove some Q/Dq nodes. This enables some non-delegated nodes (which run on the CPU) to run in float32. This improves accuracy and inference speed (by eliminating the need to artificially quantize and de-quantize activations).

Test plan

Unit tests provided.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15148

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❌ 9 New Failures, 3 Unrelated Failures

As of commit aa651f1 with merge base 57a7903 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t f8090f1f19fc0cd7298ff7ef7df8d8eb88f07db7c3f6d1ce1a53899195e058cb /exec failed with exit code 1
• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
  RuntimeError: Command docker exec -t bb3395a491f96abaa91b200ed6a9f247bc44db7fc1b2d60ac08e5e4ed7ea9310 /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  ../../dev/test_edge_passes.py::TestEdgePasses::test_remove_additional_quantize_dequantize_nodes_pass
• Test CUDA Builds / export-voxtral-cuda-artifact / linux-job (gh)
  RuntimeError: Command docker exec -t 18f18a2c36a324d26426ee172f90f658c0cbf9007d89382f5a7b11efe4a977c2 /exec failed with exit code 2
• Test CUDA Builds / test-models-cuda (add_mul) / linux-job (gh)
  RuntimeError: Command docker exec -t c20bab9d511e7667a945abf99115f5b0d50f81385fb5ac39496e4fd52b759490 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (add) / linux-job (gh)
  RuntimeError: Command docker exec -t 7cf0d15fe01142ddb46a4ab75c4d1504e67b252c5da5dc5cb7965530ad678a4a /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (conv1d) / linux-job (gh)
  RuntimeError: Command docker exec -t 994d1c34d4760cd9ebe0cd37f6c81d5e0f8494684dff74ff2b882d334c9e92d6 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (linear) / linux-job (gh)
  RuntimeError: Command docker exec -t 366924cbe03b113ae05e80f579363f38e7d6167f20d03e3df5c5b00db946e819 /exec failed with exit code 1
• Test CUDA Builds / test-models-cuda (resnet18) / linux-job (gh)
  RuntimeError: Command docker exec -t 2ce4fec0b5b563123a4a8b51ac8874f40820295d243e2d797dc1e27f0e2cfb9d /exec failed with exit code 1

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

BROKEN TRUNK - The following jobs failed but was present on the merge base:

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

• pull / unittest / windows / windows-job (gh) (trunk failure)
  runtime/test/test_runtime_etdump_gen.py::RuntimeETDumpGenTest::test_etdump_params_with_bytes_and_buffer
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  runtime/test/test_runtime_etdump_gen.py::RuntimeETDumpGenTest::test_etdump_params_with_bytes_and_buffer

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