[TASK] Remove language information from each CE in Page Module

This change removes the language title and flag from each CE,
and instead adds only the flag if the content element is set to
"All Languages" (-1).

In addition, the header is now based on flex-box instead of floats.

Resolves: #95302
Releases: master
Change-Id: I6d1a180915fba9f2ccf8df3979a2256134d18379
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71116


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Rachel Foucard <rfoucard@w-seils.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Rachel Foucard <rfoucard@w-seils.com>
Reviewed-by: Benni Mack <benni@typo3.org>