[BUGFIX] Make clear cache error notification translatable

Move title and description of the clear cache error notification
to a xlf file to make it translatable.

Resolves: #89447
Releases: master
Change-Id: I925773de216ee8283336981b2cff2bd9a087a927
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62269


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>