Merge branch 'id-allow-self-hosted-features-for-com' into 'master'

Feature flag to allow self-hosted features on .com

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/168337



Merged-by: Eduardo Bonet <ebonet@gitlab.com>
Approved-by: Alex Buijs <abuijs@gitlab.com>
Approved-by: Eduardo Bonet <ebonet@gitlab.com>
Co-authored-by: Igor Drozdov <idrozdov@gitlab.com>