[TASK] Styling cleanups in several modules

This patch cleans up stylings across various modules and
streamlines the used markup as well as the folder structure.

Resolves: #90491
Releases: master

Change-Id: I7cf564da3e981f455c466dbc24a33858145525b0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63362


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Susanne Moog <look@susi.dev>