Allow uninstallation of variationcache 8.x-1.5

Attached patch removes variationcache from the group.info.yml so the module can be uninstalled.

Additional patch that applies against 8.x-1.6 with release packaging information.

An updated patch as the references to variationcache needs to be replaced with the core version.

And a version with packing info

The latest patch still causes type errors. I extended the latest patch to also update references in ChainGroupPermissionCalculator.

Now also with added packaging info