Merge branch 'if-441241-script_for_gar_integration' into 'master'

Google Cloud integration API: GAR integration setup script

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144787



Merged-by: Grzegorz Bizon <grzegorz@gitlab.com>
Approved-by: Grzegorz Bizon <grzegorz@gitlab.com>
Reviewed-by: Grzegorz Bizon <grzegorz@gitlab.com>
Reviewed-by: João Pereira <jpereira@gitlab.com>
Co-authored-by: Imre Farkas <ifarkas@gitlab.com>