[TASK] Streamline usage of DebugConsole

Since the backend DebugConsole has been rewritten in jQuery, references
to the old ExtJS variant can either be removed or adjusted to work with
the new DebugConsole.

Resolves: #71055
Releases: master
Change-Id: Ic4eddafdf1a767101e921d5ca5a85f87a66a9983
Reviewed-on: https://review.typo3.org/44303


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>