Qualcomm AI Engine Direct - Adding QNN backend support for avg_pool_1d core ATen op

[qti-horodnic]

Summary

Adding support for the avg_pool_1d ATen op by a decomposition pass using avg_pool_2d and the flow:

avg_pool1d(N, C, L) 
  → unsqueeze(2) 
  → avg_pool2d(N, C, 1, L) with kernel (1, k)
  → squeeze(2)
  → output(N, C, L_out)

Refactored the existing logic to combine the logic from adaptive_avg_pool1d into a single annotation for both ops.

Test plan

python backends/qualcomm/tests/test_qnn_delegate.py -k TestQNNQuantizedOperator.test_qnn_backend_avg_pool1d --model SM8750 --host aisw-vm19-labsd --device b3bf37fe --build_folder build-android
python backends/qualcomm/tests/test_qnn_delegate.py -k TestQNNFloatingPointOperator.test_qnn_backend_avg_pool1d --model SM8750 --host aisw-vm19-labsd --device b3bf37fe --build_folder build-android

python backends/qualcomm/tests/test_qnn_delegate.py -k TestQNNFloatingPointOperator.test_qnn_backend_adaptive_avg_pool1d --model SM8750 --host aisw-vm19-labsd --device b3bf37fe --build_folder build-android
python backends/qualcomm/tests/test_qnn_delegate.py -k TestQNNQuantizedOperator.test_qnn_backend_adaptive_avg_pool1d --model SM8750 --host aisw-vm19-labsd --device b3bf37fe --build_folder build-android

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/18733

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❌ 2 New Failures, 3 Unrelated Failures

As of commit c57e55a with merge base c7f1d72 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-ops / test-ops (gh)
  examples/cadence/operators/test_g3_ops.py::ATenOpTestCases::test_g3_neg_out_2
• pull / unittest-arm-backend-with-no-deps (test_pytest_ops_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 71d174e42cc3526481484f0cf312240082176aa03f80b24939006115be127839 /exec failed with exit code 1

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

• pull / unittest-buck / linux / linux-job (gh) (matched linux rule in flaky-rules.json)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

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)
  ##[error]The operation was canceled.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[qti-horodnic]

@pytorchbot label "release notes: qualcomm"

[abhinaykukkadapu]

@qti-horodnic thanks for adding the support.