[TASK] Replace pagination widget in ext extensionmanager

Instead of using the be.widget.paginate widget, extensions are
now paginated with a QueryResultPaginator and the pagination is
build with the help of a SimplePagination instance.

Since there is an ArrayPaginator in the core as well, the search
result list is now paginated as well.

Releases: master
Resolves: #92003
Change-Id: I80f1d34b363d25176961139e3ded48e9ab2c165e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64524


Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Benni Mack <benni@typo3.org>