[TASK] Streamline escaping for ViewHelpers of all sysexts

The Core does not strictly use $escapeChildren and
$escapeOutput as properly introduced by Fluid Standalone in 8.0.

This results in some weird HTML output when using the inline syntax
currently.

Since $escapeOutput and $escapeChildren is active by default,
some ViewHelpers even do HSC on their own (= twice) even if not
needed.

Resolves: #75575
Releases: master
Change-Id: I3bbebe75c0368519d3506360c68df92d30a3b80a
Reviewed-on: https://review.typo3.org/47644


Reviewed-by: Helmut Hummel <helmut.hummel@typo3.org>
Tested-by: Helmut Hummel <helmut.hummel@typo3.org>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>