Add workflow to replace Windows GPU Doc Gen CI Pipeline (#28192)
To avoid "azp run Windows GPU Doc Gen CI Pipeline" for PR from external
contributors.
The "Windows GPU Doc Gen CI Pipeline" can be removed after this PR is
merged.
Example run that caught doc mismatch, and correct docs are uploaded in
"Upload updated documentation":
https://github.com/microsoft/onnxruntime/actions/runs/24813688480/job/72623549343?pr=28185
Artifact download URL:
https://github.com/microsoft/onnxruntime/actions/runs/24813688480/artifacts/6593754537