[!!!][TASK] Remove deprecated disable_autocreate feature of workspaces

Resolves: #62415
Releases: master
Change-Id: I2c51f66c13f10ed4b442f52b20899820f92a5248
Reviewed-on: http://review.typo3.org/35411
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Tested-by: Alexander Opitz <opitz.alexander@googlemail.com>