Merge branch '523240-include-subgroups' into 'master'

Show subgroup projects in the DORA projects comparison visualization

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184211



Merged-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Approved-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Reviewed-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Reviewed-by: Alex Pennells <apennells@gitlab.com>
Co-authored-by: Alex Pennells <apennells@gitlab.com>