(#22319) Constrain settings watchedfile integration on windows

File.ctime provides creation time on Windows, and shows no change in
WatchedFile.  But we have no long running processes in Windows, so we
would not be reloading configs, and this test can be skipped.
Merge pull request #1860 from jpartlow/issue/stable/22319-constrain-integration-spec-on-windows

(#22319) Constrain settings watchedfile integration on windows