Fixes #36574 - Update fast_gettext to ~> 2.1

Refs #36574 - Avoid patching Fastgettext

The code defines an additional method on Fastgettext but there's no
reason to do so. It can just as well define a method on itself.

Fixes #33890 - Require Foreman::Gettext in initializers

Fix deprecation warning the about initialization of auto-loaded constants

Fixes #31717 - lazy-load fast_gettext for faster boot (#8275)

It's because we switch over all 20 languages to actually pull language name in the native language into a list of available languages. We use that in three places: settings page, user page and GraphQL....

Fixes #29349 - Fix Layout/SpaceInsideArrayLiteralBrackets cop

Fixes #19792 - Fix Layout/SpaceInsideBlockBraces cop

Fixes #19789 - fix Layout/SpaceAroundOperators cop

fixes #14741 - translate template kind string, not object

Also convert translation keys to strings in debug mode to prevent
concatenation errors.

Refs #3809 - Remove cops for empty lines

Refs #3809 - Enable cop BarePercentLiterals