[TASK] Drop reference index in workspace discard more effectively

Dealing with workspace-discard, where rows are always fully
dropped in DB, the expensive reference index operation does
not need to be performed at all. It can be substituted with
straight db-delete calls for affected sys_refindex rows.

Change-Id: Iaa61ef2345c63394fa3286cc9d5dabc5b1a4bb55
Resolves: #92392
Releases: master, 10.4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65841


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>