[TASK] Move workspaces preview hook to PSR-15 middleware

Frontend-related hooks are migrated into a PSR-15
compatible middleware to initialize workspace behaviour
and previewing functionality.

Resolves: #84040
Releases: master
Change-Id: I8a86665aad95a84d4d65700949d861b96d006c13
Reviewed-on: https://review.typo3.org/55899


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: Daniel Gorges <daniel.gorges@b13.de>
Tested-by: Daniel Gorges <daniel.gorges@b13.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>