Windows cuda export ci and set up script

[JacobSzwejbka]

Add a script that tries to auto install mingw and the windows cuda rt. Sets up WINDOWS_CUDA_HOME as well for now though we should probably move away from using random env variables for stuff like this...

To test add some export stuff to CI. Just verify that export and lowering succeeds against the usual suspects. A follow up will spin up some windows + cuda machines and try running whisper and voxtral.

[pytorch-bot]

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❌ 16 New Failures, 2 Unrelated Failures

As of commit 9a28763 with merge base c61b2ed ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for scripts/install_windows_cuda_deps.py:
• pull / test-samsung-models-linux / linux-job (gh)
  test_dl3_fp16
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  RuntimeError: Command docker exec -t 34b0918ea9e7375e7e2df9c3884133eabab710795bbb6b7299d2770229fd03e7 /exec failed with exit code 1
• Test CUDA Builds / test-model-cuda-e2e (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t d6b2c79a5e3fa53b072f08ae4475a43cc996d6d017dd9a0002ebead1ef586fb9 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (google, gemma-3-4b-it, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t ee46fc23934d73a1a7eee8c2d2ee89381da82e780bc409beac69564d65131c05 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (google, gemma-3-4b-it, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t a2ba02db991d7f9589417a5b009967d0aa17cb4c5121d6825dfa5b20d8132cd6 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (mistralai, Voxtral-Mini-3B-2507, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t b5c23d18baa1836cf328e0de7d3cf7f3fe82aac76f40e6b9943a4dc903c2d624 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t f0dc4b1463ee393b05619a37eebf88ec59f7536313801fa1e56789f87f4fa577 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t a21e8708fd5d93cc2182cada1dbcce6109b75be133765c51500129f8a231b58a /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (openai, whisper-large-v3-turbo, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t f687332d458c7fb17e27c93510bfad240176a09965ba101d828f4de1346f0cae /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (openai, whisper-large-v3-turbo, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 266a4fd6050c39781a19e7b4993ae4c4259d758cc3b6452359c9e6576678a308 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (openai, whisper-large-v3-turbo, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 680505f4b5bb99ae5c069bb310c2e5acc28b922d64cfae725e2cf0bd8103384b /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (openai, whisper-small, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t 4c71fba7d502ae6b3510d6839f887f72baa9071608550a04da69c0be2ebb3f08 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (openai, whisper-small, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t c33375942e800408e2297067706b96834903452396d5756cf21fe380c1ed3a2b /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (openai, whisper-small, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 78f0ece98d5313f45d07201b993d3a1fc9acdcb5987669a134823e65a2ab5002 /exec failed with exit code 1
• trunk / test-arm-backend (test_pytest_models_ethosu_fvp) / linux-job (gh)
  RuntimeError: Command docker exec -t 65e007362babcb43422db3d5bebdd05687cf3e7befcd88f22dc1b40bf3493f95 /exec failed with exit code 1

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / test-llama-runner-linux (fp32, xnnpack+custom+qe, linux.arm64.2xlarge, executorch-ubuntu-22.04-gc... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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

• pull / android / run-emulator (gh) (#16137)

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