[BUGFIX] StorageRepository fails to load storages

StorageRepository fails to load storages if new one is created.
This is regression to #55186.

Resolves: #55992
Releases: 6.2
Change-Id: I72dc36bb01141695249cf104237f10dfdcfc2b16
Reviewed-on: https://review.typo3.org/27634
Reviewed-by: Steffen Ritter
Reviewed-by: Frans Saris
Tested-by: Steffen Ritter