[TASK] Use PSR-7 Response objects for external URL redirects

Instead of immediately exiting, allow to post-process the response
through the middleware chain.

Change-Id: Icfb47f7cd84c80201a3c3b9927267e8b8aaef440
Releases: master
Resolves: #83794
Reviewed-on: https://review.typo3.org/55586


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>