Merge branch '477279-fix' into 'master'

Fix index namespaces for indexing subgroup associations

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/170314



Merged-by: Terri Chu <tchu@gitlab.com>
Approved-by: Siddharth Dungarwal <sdungarwal@gitlab.com>
Approved-by: Ravi Kumar <rkumar@gitlab.com>


(cherry picked from commit 07ed3df0)

24112fb1 Fix indexing group associations for subgroups

Co-authored-by: Terri Chu <tchu@gitlab.com>