Merge branch 'pedropombeiro/516862/ignore-orphaned-runners' into 'master'

Allow rejecting orphaned runners from REST endpoints

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/180163



Merged-by: Tianwen Chen <tchen@gitlab.com>
Approved-by: Dmitry Gruzd <dgruzd@gitlab.com>
Approved-by: Fred Reinink <freinink@gitlab.com>
Approved-by: Allen Cook <acook@gitlab.com>
Approved-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Tianwen Chen <tchen@gitlab.com>
Reviewed-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Reviewed-by: Tianwen Chen <tchen@gitlab.com>
Reviewed-by: Fred Reinink <freinink@gitlab.com>
Co-authored-by: Pedro Pombeiro <noreply@pedro.pombei.ro>