[TASK] Use ServerRequestInterface in Wizard/AddController

Replace _GP, getIndpEnv, public methods, public properties

Resolves: #84321
Releases: master
Change-Id: I911927568b8ea86b4edb2bef5a25e84c625e27ef
Reviewed-on: https://review.typo3.org/56200


Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>