Revert "Revert "Qualcomm AI Engine Direct - improve llama3.2 3B TPS""

[metascroy]

Reverts #21143

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/21150

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❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Unrelated MacOS MPS test jobs time out (30 min) due to stale cpp_extension lock file poisoning self-hosted runners

❌ 1 New Failure, 189 Pending

As of commit c7bb788 with merge base 3ba685e ():

NEW FAILURE - The following job has failed:

• Apple / build-demo-ios / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 128

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[psiddh]

cc @chenweng-quic

[chenweng-quic]

Thanks!