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

[qti-horodnic]

Summary

Added support for the select_scatter core ATen op using a decomposition pass and the identity:

select_scatter(input, src, dim, index) = slice_scatter(input, src.unsqueeze(dim), dim, index, index+1, 1)

Test plan

python backends/qualcomm/tests/test_qnn_delegate.py -k TestQNNQuantizedOperator.test_qnn_backend_select_scatter --model SM8750 --host aisw-vm15-labsd --device 545ee4aa --build_folder build-android

python backends/qualcomm/tests/test_qnn_delegate.py -k TestQNNFloatingPointOperator.test_qnn_backend_select_scatter --model SM8750 --host aisw-vm15-labsd --device 545ee4aa --build_folder build-android

[pytorch-bot]

🔗 Helpful Links

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✅ You can merge normally! (1 Unrelated Failure)

As of commit b0482c8 with merge base 1feb56c ():

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

• pull / test-qnn-testsuite-linux / test-backend-linux (qnn, models) / 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.

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[qti-horodnic]

@pytorchbot label "release notes: qualcomm"