[TASK] Doctrine: Migrate StorageRepository

Resolves: #77213
Releases: master
Change-Id: I3983b2e1304dccd5211124375aaec5bf0532f961
Reviewed-on: https://review.typo3.org/49282


Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>