[Bug]: Python Unit Tests are flaky on windows

[liferoad]

What happened?

https://github.com/apache/beam/actions/workflows/python_tests.yml

This is flaky when running with Windows.

Several failed runs:

https://github.com/apache/beam/actions/runs/13738051736

https://github.com/apache/beam/actions/runs/13738775243/job/38425603429?pr=34196

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

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