[TASK] Do not rely on sys_page cache shortcut for fetching TSconfig

The TypoScript Frontend Controller has a unnecessary dependency
to a static call (which is made non-static !) of PageRepository
which can be done exactly 1:1 by instantiating the cacheManager
and fetching the "cache_hash" cache directly by storing and fetching
the contents itself.

Resolves: #80480
Releases: master
Change-Id: If6f5976a6c07ea754915b9c612264d733a6b1a41
Reviewed-on: https://review.typo3.org/52179


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>