Merge branch '498877-rm-fk' into 'master'

Remove broken foreign key fk_a2141b1522_p

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183638



Merged-by: Marius Bobin <mbobin@gitlab.com>
Approved-by: Max Orefice <morefice@gitlab.com>
Approved-by: Marius Bobin <mbobin@gitlab.com>
Reviewed-by: Max Orefice <morefice@gitlab.com>
Co-authored-by: Tianwen Chen <tchen@gitlab.com>