Set pip temp dir in wheel build to work around Windows path length

[GregoryComer]

Summary

We're hitting path length issues again on Windows with the new Python 3.13 build. Trying to reduce path length for the dependency installation by setting the temp dir that pip uses.

Also, trigger the Windows wheel job when the PR has the ciflow/binaries label. The other platforms (Mac, Linux, etc.) have this feature, but it was missing in the Windows job, making it hard to test.

Error:

Path: C:\Users\runneruser\AppData\Local\Temp\pip-install-t186wfw7\pytorch-tokenizers_edc5e5950de84fb5993a8c67c219d925\build\temp.win-amd64-cpython-313\Release\pytorch_tokenizers.pytorch_tokenizers_cpp\CMakeFiles\4.2.0\VCTargetsPath\x64\Debug\VCTarget.E9FDE662.Up2Date exceeds the OS max path limit. The fully qualified file name must be less than 260 characters.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16234

• 📄 Preview Python docs built from this PR

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❗ 1 Active SEVs

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

• Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/home/ec2-user/actions-runner/_work/pytorch/pytorch/.github/actions/check-tpu'

❌ 4 New Failures, 1 Cancelled Job, 5 Unrelated Failures

As of commit 3f812fb with merge base c493e2d ():

NEW FAILURES - The following jobs have failed:

• pull / test-lora-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 43d9eaf8594fe0e92456ddb200bf2358febb99b090cd8185c24dee188a970e73 /exec failed with exit code 1
• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t 9c25334d07f1f08c506ae6d4ff2a38af5aa8a0f5c0c2372f2d8a90eeadc6eb09 /exec failed with exit code 139
• pull / unittest / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_linear_model
• pull / unittest-editable / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_linear_model

CANCELLED JOB - The following job was cancelled. Please retry:

• pull / test-binary-size-linux-gcc / linux-job (gh)

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

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

• Build Windows Wheels / pytorch/executorch / build-wheel-py3_13-cpu (gh) (trunk failure)
  ModuleNotFoundError: No module named 'executorch'
• Build Windows Wheels / pytorch/executorch / upload / upload-wheel-py3_13-cpu (gh) (trunk failure)
  Unable to download artifact(s): Artifact not found for name: pytorch_executorch__3.13_cpu_x64
• pull / test-openvino-linux / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / test-setup-linux-gcc / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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