[TASK] Use PSR-7 Request information in cObj

Since TYPO3 v11, the PSR-7 Request Object
is always available in ContentObjectRenderer,
so it can be used to access GET/POST parameters
instead of GeneralUtility::_GET() and GeneralUtility::_POST()

Resolves: #96802
Releases: main
Change-Id: Ided7c53b5466be0bea07b69ef533037ed084a8a5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73372


Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>