NXP backend: Better handling of arg indexes in Neutron quantizer

[roman-janik-nxp]

Summary

Introduces NodeArgsIdx class to Neutron Quantizer for better handling of indexes to quantized node's args list. Allows selection of nested objects, e.g. an object in a list in node's args list. Simplifies NeutronAtenQuantizer annotation process by using annotate_inputs() for inputs, weights and biases.

Test plan

All current test that use Neutron Quantizer internally.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/13368

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❌ 1 New Failure, 5 Unrelated Failures

As of commit bcfe3ee with merge base 5aa127e ():

NEW FAILURE - The following job has failed:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
  RuntimeError: Command docker exec -t f44fd2d5f6190ecb0e349e45f9a2a5bee2b1c7592c0864ffd8bda082646fa991 /exec failed with exit code 1

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

• pull / unittest / macos / macos-job (gh) (similar failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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 / linux / linux-job (gh) (trunk failure)
  examples/models/llama/tests/test_ring_attention.py::TestRingAttention::test_single_token_processing_quantized
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh) (trunk failure)
  backends/arm/test/models/stable_diffusion/test_vae_AutoencoderKL.py::TestAutoencoderKL::test_AutoencoderKL_tosa_MI
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
  examples/models/llama/tests/test_ring_attention.py::TestRingAttention::test_single_token_processing_quantized
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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[StrycekSimon]

@pytorchbot label "release notes: nxp"