Merge branch '432848-optimize-routable-where_full_path_in-by-avoiding-joins' into 'master'

Resolve "Optimize Routable.where_full_path_in by avoiding joins"

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137886



Merged-by: Thong Kuah <tkuah@gitlab.com>
Approved-by: Mohamed Hamda <mhamda@gitlab.com>
Approved-by: Alex Buijs <abuijs@gitlab.com>
Approved-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Thong Kuah <tkuah@gitlab.com>
Reviewed-by: Manoj M J <mmj@gitlab.com>
Reviewed-by: Mohamed Hamda <mhamda@gitlab.com>
Co-authored-by: Manoj M J <mmj@gitlab.com>