[!!!][TASK] Drop functionality of including hidden fe_groups via Admin Panel

AdminPanel's feature to include hidden records, also included fe_groups,
which allowed to preview fe_groups which are marked as "hidden".

This feature has been removed as frontend groups need to be visible
in order to be previewed.

Resolves: #92499
Releases: master
Change-Id: Ic48b34a07b008e99d985569f2932979cdb08540a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66069


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>