[TASK] Avoid setAccessible()

setAccessible() in reflection is a no-op
since PHP 8.1. It can be removed.

Resolves: #100444
Releases: main
Change-Id: I750ef13f93360aaeaba244415275092f0f604818
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78457


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Stefan Bürk <stefan@buerk.tech>