As developer I want to be sure in what language I am creating configuration objects

Move the config from the parent issue of rocketship core to the profile. Added install hook to enable the language negotiation.

Rebased changes on top of 6.1.x

cli_language module only locks language in the CLI, but not in the UI. So dev is still able to create config in another language.
This might fix weird issues during config import/export when language is switched in the middle and config translations are overridden.

The 🐛 Prevent saving config entities when configuration overrides are applied Needs work gained again some momentum and looks more like fix to this issue.