fix: for Windows, copy snapshot files being backed up #22563
Merged
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On Windows, make copies of files for snapshots, because
Go does not support the FILE_SHARE_DELETE flag which
allows files (and links) to be deleted while open. This
causes temporary directories to be left behind after
backups.
closes #16289
(cherry picked from commit 3702fe8)
closes #22557
(cherry picked from commit 47007f6)
closes #22558