[TASK] Migrate LocalizationUtility Test to Functional

Avoid heavy mocking in tests by
utilizing Functionals incl. PackageManager
and Caching Framework.

Resolves: #99553
Releases: main
Change-Id: Ie569e87c0710a50ce09cc60f3d9a1773d39d4b4b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77391


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>