Arm backend: Fix broken tests

[oscarandersson8218]

Tests in test_rescale_optimization.py were not passing for various reasons such as pass not being called properly and trying to run inferences using TOSA backend dialect operators.

cc @digantdesai @freddan80 @per @zingo @mansnils @Sebastian-Larsson @robell

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/18368

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure, 5 Cancelled Jobs, 1 Pending, 3 Unrelated Failures

As of commit bd743d0 with merge base 2165b5a ():

NEW FAILURE - The following job has failed:

• trunk / test-arm-backend-vkml (test_pytest_ops_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t 7eeab149c48833327a806009f9bcc9a2f9406e2936b6aa3792242e66bfb1d8d9 /exec failed with exit code 1

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

• periodic / gather-models (gh)
• trunk / test-llama-runner-mac (fp32, coreml) / macos-job (gh)
  ##[error]The operation was canceled.
• trunk / test-models-macos-coreml (efficient_sam) / macos-job (gh)
  ##[error]The operation was canceled.
• trunk / test-models-macos-mps / macos-job (gh)
  ##[error]The operation was canceled.
• trunk / unittest-release / macos / macos-job (gh)
  ##[error]The operation was canceled.

BROKEN TRUNK - The following jobs failed but were 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.
• trunk / unittest-release / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[oscarandersson8218]

vgf_fp16 test seems flaky.