Reapply "[Windows] Run native unit tests in CI (#13923)"

[GregoryComer]

Summary

This is a re-land of #13923, fixing Meta-internal build errors. It looks like I just need to add the c10:: namespace to is_reduced_floating_point_v in one spot. It looks like this is defined in the executorch::runtime namespace when in portable mode, but not in ATen mode:

executorch/runtime/core/exec_aten/util/scalar_type_util.h

Line 85 in 233063c

constexpr bool is_reduced_floating_point_v =

. Hence the internal failure when building internally in ATen mode. Not sure why it is this way, but accessing it via the c10 namespace works in all cases.

Test plan

CI. I'm importing the diff to validate correctness.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14287

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❌ 1 New Failure, 3 Cancelled Jobs, 1 Unrelated Failure

As of commit bfb3fca with merge base 10e93fb ():

NEW FAILURE - The following job has failed:

• trunk / test-llama-runner-mac (fp32, coreml) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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

• pull / unittest / macos / macos-job (gh)
  ##[error]The operation was canceled.
• pull / unittest-editable / macos / macos-job (gh)
  ##[error]The operation was canceled.
• trunk / unittest-release / macos / macos-job (gh)
  ##[error]The operation was canceled.

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

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

• pull / test-openvino-linux / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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@GregoryComer has imported this pull request. If you are a Meta employee, you can view this in D82345075.