[JacobSzwejbka]

Release-only changes for release/1.6, following the branch-cut work in #19810 and #21401 and the release script. Relates to #23608.

Pins the PyTorch test-infra workflows, actions, and their internal checkout inputs to release/2.15. Setting both references prevents a release workflow from loading its scripts from a moving main branch. The existing Windows CUDA wheel checkout stays at e3d344d886a7281f6a919115d332df2a080da8ad, because the release branch still contains the conda upgrade failure fixed by pytorch/test-infra#9179.

The CUDA workflow assertion follows the release ref while retaining the checks that the node supplies its GPU driver.

Validation: parsed all 75 workflow YAML files; verified all 15 distinct referenced test-infra workflows/actions exist on release/2.15; checked the input contracts for all 159 reusable workflow calls; all six CUDA workflow tests pass; Black 24.4.2 and git diff --check pass. Full platform execution is left to PR CI.

Authored with Codex assistance.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/24197

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❌ 2 New Failures, 1 Pending, 2 Unrelated Failures, 7 Unclassified Failures

As of commit 3ff68a3 with merge base 4db778e ():

NEW FAILURES - The following jobs have failed:

• Test OpenVINO Backend / test-openvino / test-backend-linux (openvino, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 2
• Test OpenVINO Backend / test-openvino / test-backend-linux (openvino, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 2

UNCLASSIFIED FAILURES - DrCI could not classify the following jobs because the workflow did not run on the merge base. The failures may be pre-existing on trunk or introduced by this PR:

• Test CUDA Windows Export and E2E / test-model-cuda-windows-e2e (facebook, dinov2-small-imagenet1k-1-layer, non-quantized) / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch
• Test CUDA Windows Export and E2E / test-model-cuda-windows-e2e (mistralai, Voxtral-Mini-3B-2507, non-quantized) / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch
• Test CUDA Windows Export and E2E / test-model-cuda-windows-e2e (mistralai, Voxtral-Mini-3B-2507, quantized-int4-weight-only) / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch
• Test CUDA Windows Export and E2E / test-model-cuda-windows-e2e (mistralai, Voxtral-Mini-4B-Realtime-2602, quantized-int4-tile-packed) / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch
• Test CUDA Windows Export and E2E / test-model-cuda-windows-e2e (nvidia, parakeet-tdt, non-quantized) / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch
• Test CUDA Windows Export and E2E / test-model-cuda-windows-e2e (nvidia, parakeet-tdt, quantized-int4-weight-only) / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch
• Test CUDA Windows Export and E2E / unittest-cuda-runtime-windows / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  executorch

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / nxp-mcuxpresso-test / linux-job (gh) (trunk failure)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test CoreML Backend / test-coreml / test-backend-macos (coreml, models) / macos-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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