Merge branch...

Merge branch '505645-package-registry-optimize-query-for-selecting-projects-within-a-namespace' into 'master' 

Package registry: Optimize query for selecting projects within a namespace

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175358



Merged-by: Dzmitry (Dima) Meshcharakou <12459192-dmeshcharakou@users.noreply.gitlab.com>
Approved-by: Dzmitry (Dima) Meshcharakou <12459192-dmeshcharakou@users.noreply.gitlab.com>
Approved-by: Adam Hegyi <ahegyi@gitlab.com>
Reviewed-by: Dzmitry (Dima) Meshcharakou <12459192-dmeshcharakou@users.noreply.gitlab.com>
Reviewed-by: Radamanthus Batnag <rbatnag@gitlab.com>
Reviewed-by: Moaz Khalifa <mkhalifa@gitlab.com>
Co-authored-by: Radamanthus Batnag <rbatnag@gitlab.com>