[TASK] Clean up types in ResourceStorageTest

Resolves: #98937
Related: #98936
Releases: main
Change-Id: I55ed2c9546312c8bc9b99ffae2b8d3c8a38b5117
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76300


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>