[BUGFIX] Correct storage selection (follow-up)

The new matching did not consider Windows paths names as the
previous version did. Using PathUtility is safer.

Releases: 6.2, 6.1, 6.0
Resolves: #52173
Change-Id: Ib0454a468bb93f5baab9677ffafc86efd0f1ae27
Reviewed-on: https://review.typo3.org/25232
Reviewed-by: Steffen Ritter
Tested-by: Steffen Ritter