[BUGFIX] Resolve label in title attribute of ClearCacheToolbarItemSingle

Resolves: #82749
Releases: master, 8.7
Change-Id: I1de1157ca8e28da3a9fd3ffb3783bb73b1f8e845
Reviewed-on: https://review.typo3.org/54382


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Gianluigi Martino <gmartino27@gmail.com>
Tested-by: Gianluigi Martino <gmartino27@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>