Merge branch '428488-implement-new-hierarchy-queries' into 'master'

Implement cached hierarchical queries

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141628



Merged-by: Adam Hegyi <ahegyi@gitlab.com>
Approved-by: Max Fan <mfan@gitlab.com>
Approved-by: Matt Kasa <mkasa@gitlab.com>
Reviewed-by: Terri Chu <tchu@gitlab.com>
Reviewed-by: Tianwen Chen <tchen@gitlab.com>
Reviewed-by: Max Fan <mfan@gitlab.com>