[CI] [runtime env] Skip flaky test_no_spurious_worker_startup
on windows
#30482
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Why are these changes needed?
This test recently became much flakier:

It's not clear what caused it. The seemingly most relevant PR around that time is #30219 but it's not obvious how it connects to the failing test.
This PR skips the test on Windows to fix CI, but we should identify and fix the cause of flakiness.
Related issue number
Mitigates #30474 but we should fix the root cause of the flakiness before closing that issue.
Checks
git commit -s
) in this PR.scripts/format.sh
to lint the changes in this PR.