[FEATURE] Add normalized server parameters to PSR-7 requests

To slowly substitute GeneralUtility::getIndpEnv() with a
better API, a new class is introduced that calculates all
normalized server parameters.
The object is added as PSR-7 request attribute in a frontend
and backend middleware.
For a transition phase, the request is made available
as $GLOBALS['TYPO3_REQUEST'] until enough core code has
been refactored to get rid of this again.

Resolves: #83736
Releases: master
Change-Id: I96c8cb6dda4cc38bbb51b64439b8e81f2c00d7ac
Reviewed-on: https://review.typo3.org/55506


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>