ECMS-6531: Revert ECMS-5589 from Platform 4.1.

Fix description:
* Roll back ECMS-5589, ECMS-6160, ECMS-6189
* Enable again the configuration of WCMTemplateUpgradePlugin
Merge commit '3367c74e68a4dba0b127964eece2ec2e7c198d53' into integration/4.1.x-translation