[TASK] Avoid getLL() usages in various system extensions

Using sL() instead of getLL() shows direct dependencies
on labels and their label files within the code.

This change replaces all usages in
* extensionmanager
* form
* impexp
* install
* reports
* setup
* filelist

with sL() calls.

Resolves: #100668
Releases: main
Change-Id: Ic3cb1e307c9312a2fc2e0b21b3149c4baddebfe3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78755


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>