[!!!][TASK] Remove deprecated code from ModuleTemplate

Removal of b/w code from backend view
refactorings in v12.

Resolves: #101004
Related: #100963
Related: #96903
Related: #96730
Related: #97787
Releases: main
Change-Id: Ic1d0556d40407198c163cd91b6dca4e040bc79af
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79265


Reviewed-by: Thomas Hohn <tho@gyldendal.dk>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>