Arm backend: Change node.name to buffer name when indexing state_dict

[Sebastian-Larsson]

Using node.name for indexing state_dict can result in the following:

KeyError: 'b__tensor_constant1'.

Using the following to fetch the buffer name is the correct way to do it:

buffer_name = self.exported_program.graph_signature.inputs_to_buffers[
    node.name
]

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12485

• 📄 Preview Python docs built from this PR

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

❌ 1 New Failure, 1 Unrelated Failure

As of commit ade34af with merge base c2d6f3d ():

NEW FAILURE - The following job has failed:

• pull / test-eval_llama-mmlu-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 0d2aebe51d4c9bfcac86f60bde8d591195b3344853eadd96db179b395bc14499 /exec failed with exit code 1

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

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

• Apple / build-benchmark-app / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 65

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