Merge branch...

Merge branch '430141-support-for-setting-parent-work-items-at-namespace-level-with-ancestor-and-descendent-support' into 'master' 

Support setting ancestor in work items parent widget

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152503



Merged-by: Eugenia Grieff <egrieff@gitlab.com>
Approved-by: Aman Luthra <aluthra@gitlab.com>
Approved-by: Deepika Guliani <dguliani@gitlab.com>
Approved-by: Coung Ngo <cngo@gitlab.com>
Approved-by: Eugenia Grieff <egrieff@gitlab.com>
Reviewed-by: Deepika Guliani <dguliani@gitlab.com>
Co-authored-by: Rajan Mistry <rmistry@gitlab.com>