Qualcomm AI Engine Direct - xr model enablement (mld_f)

[haowhsu-quic]

Summary

• add gather op support
• make cast / slice op more general

Test plan

python backends/qualcomm/tests/test_qnn_delegate.py TestQNNQuantizedOperator

[pytorch-bot]

🔗 Helpful Links

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❌ 5 New Failures

As of commit 4b24a82 with merge base df75088 ():

NEW FAILURES - The following jobs have failed:

• Check Labels / Check labels (gh)
  RuntimeError: Error checking labels: PR does not have required labels
• Lint / link-check / lint-urls / linux-job (gh)
  RuntimeError: Command docker exec -t dbfd27baca422b0fa96cbebafaa406e3366b6fc9f1e36f26d6222e50f975e04e /exec failed with exit code 127
• Lint / link-check / lint-xrefs / linux-job (gh)
  RuntimeError: Command docker exec -t b691688e159f301f9c4fff8cfe41666281297e7ca3d4b194f09af7e54ec5b242 /exec failed with exit code 127
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  RuntimeError: Command docker exec -t c721981e5bc91b748745beb94fb5b4a6ff920fd0108d9f4133a3d6e7cdeeeddd /exec failed with exit code 127
• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
  RuntimeError: Command docker exec -t 89eee3ff6a3991ed5c9228275fee7369618c62cd6249711e80cb091501a48979 /exec failed with exit code 127

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