[TASK] Use multi record selection in scheduler module

The multi record selection component, introduced in
allows to remove the custom checkbox logic next to
further improvements. For example, one can now
execute actions only for tasks of a specific task
group. This is possible since the multi record
selection component handles each task group as
a separate instance. This is achieved by applying
the "multi-record-selection-identifier" to each
task group container.

Besides, this patch does the following:

* Remove any dependency to EXT:recordlist
* Fix collapsing of task groups and toggling of icon
* Fix tablesort styling, applied to the header cols
* Remove unused span tags from the table listing
* Always execute tasks via POST

Resolves: #94918
Related: #94906
Releases: master
Change-Id: Iecc2874cdb32e6c4a2d0552f78a19c61052c046e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70675


Tested-by: core-ci <typo3@b13.com>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>