Arm backend: Use TosaSpecification list method

[per]

Summary

Move added TOSA dialect operator to use the class method to be registered for all supported TOSA versions.

Test plan

Through upstream CI.

cc @freddan80 @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17068

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 5 New Failures, 1 Cancelled Job, 2 Unrelated Failures

As of commit 828700c with merge base ec4c462 ():

NEW FAILURES - The following jobs have failed:

• pull / test-lora-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 46ea6f4d2d2a4d4089aadbb0e672a6c835296c80f9b0f53f21d34f875167ef9e /exec failed with exit code 1
• pull / unittest-buck / linux / linux-job (gh)
  RuntimeError: Command docker exec -t dac6df7ed3501f1401c88614564994abb435d3a0184fef3907417c08988f6c5b /exec failed with exit code 3
• pull / unittest-editable / macos / macos-job (gh)
  extension/llm/tokenizers/test/test_hf_tokenizer.py::TestHfTokenizer::test_llama3_2_1b
• trunk / test-arm-backend-ethos-u (test_model_smollm2-135M) / linux-job (gh)
  RuntimeError: Command docker exec -t 7779003cc8722307b083e8260a180cd8aaa6ab4d1957835ed4740a8d67e3bb00 /exec failed with exit code 2
• trunk / test-huggingface-transformers-macos (olmo-1b|coreml_fp32_gpu|--quantize) / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1

CANCELLED JOB - The following job was cancelled. Please retry:

• trunk / test-models-macos-coreml (ic3) / macos-job (gh)
  ##[error]The operation was canceled.

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

• trunk / test-huggingface-transformers-macos (llama3.2-1b|coreml_fp32_gpu|--quantize) / macos-job (gh) (detected as infra flaky with no log or failing log classifier)

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

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

• pull / unittest-buck / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 3

This comment was automatically generated by Dr. CI and updates every 15 minutes.