[TASK] Replace GeneralUtility::_GP in database and file browser

Use the PSR-7 request instead of Superglobals.

Resolves: #96840
Releases: main
Change-Id: Iec2e1299584b09aa1967a93c320d87967fd85a80
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73435


Tested-by: core-ci <typo3@b13.com>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>