[TASK] RecordListController: psr-7, Code Cleanup

* Replace _GP with psr-7 request calls
* Declare internal public properties as protected
* Minor code cleanups as the removal of unneeded properties

Resolves: #88757
Releases: master
Change-Id: I7a8919d1f333783e7772a2257741c56a6f213e70
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61297


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Steffen Frese <steffenf14@gmail.com>
Tested-by: Felix P. <f.pachowsky@neusta.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Steffen Frese <steffenf14@gmail.com>
Reviewed-by: Felix P. <f.pachowsky@neusta.de>
Reviewed-by: Benni Mack <benni@typo3.org>