Merge branch 'azubov-437641-shared-subgroups-for-group-protected-environment' into 'master'

Shared subgroups for group protected environment

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141462



Merged-by: Anna Vovchenko <avovchenko@gitlab.com>
Approved-by: Pam Artiaga <partiaga@gitlab.com>
Approved-by: Tiger Watson <twatson@gitlab.com>
Approved-by: Sylvester Chin <schin@gitlab.com>
Approved-by: Anna Vovchenko <avovchenko@gitlab.com>
Reviewed-by: Andrei Zubov <azubov@gitlab.com>
Co-authored-by: Andrei Zubov <azubov@gitlab.com>