[BUGFIX] Fix various PHP 8 warnings

Resolves: #95184
Releases: master
Change-Id: I28f194f06890085a9d9297356d83e4027ab80113
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71025


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>