Qualcomm AI Engine Direct - increase index_put coverage

[pytorchbot]

Summary

• refactor a bit & add more test cases

Test plan

python backends/qualcomm/tests/test_qnn_delegate.py TestQNNQuantizedOperator.test_qnn_backend_index_put -b build-android -s $SN -m SM8750
python backends/qualcomm/tests/test_qnn_delegate.py TestQNNQuantizedOperator.test_qnn_backend_index_put_suite -b build-android -s $SN -m SM8750

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15038

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❗ 2 Active SEVs

There are 2 currently active SEVs. If your PR is affected, please view them below:

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• [ROCm][CI] Machines under the label linux.rocm.gpu.2 are undergoing maintenance.

❌ 7 New Failures, 2 Cancelled Jobs

As of commit 2957a38 with merge base e0dda90 ():

NEW FAILURES - The following jobs have failed:

• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t a402ac75e2f6d25d68bc646c830286839a63915acb1ac580732002cbc3565c4d /exec failed with exit code 9
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t 181a9ee40472c88b8624897543f1f23b46fab1c702d61f8bd20386cadcc2be74 /exec failed with exit code 9
• pull / test-openvino-linux / linux-job (gh)
  RuntimeError: Command docker exec -t d91bea293f219974289e8e997145256884547626e4261f2262658ed996fc0917 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.10) / linux-job (gh)
  RuntimeError: Command docker exec -t a3048170b5c1b285ec84202557cb94f8cd3a3b8666f8a9f256fa0efb1838e977 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.11) / linux-job (gh)
  RuntimeError: Command docker exec -t 1d48a37e107243529efebc603f63e8f5d8d22375256d60cc0256526c31942fcb /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.12) / linux-job (gh)
  RuntimeError: Command docker exec -t b9490d4ed5b9332c918787927ece3fda28391e8fe5976c95993f5ea0fadd8a63 /exec failed with exit code 1
• pull / test-static-llama-qnn-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 73908c671a725fa96c0a26b6a3a3234787cd8e1a4776d74bd2fbb677c1211969 /exec failed with exit code 9

CANCELLED JOBS - The following jobs were cancelled. Please retry:

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

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