[FEATURE] Separate system from 3rd-party extensions

This feature separates system extensions from 3rd-party extensions
visually.

The extension list shown in the Extension Manager can now be filtered
by certain extension types (system and 3rd-party extensions).

The selected filter is saved to the backend user configuration.

Resolves: #89894
Releases: master
Change-Id: Ifd2916129c792fa2a05cb0df52ee49456cfb16ca
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62595


Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>