Merge branch '434345-remove-child-quick-action' into 'master'

Add remove_child quick action for work items

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141354



Merged-by: Jarka Košanová <jarka@gitlab.com>
Approved-by: Eugenia Grieff <egrieff@gitlab.com>
Approved-by: Sebastian Rehm <srehm@gitlab.com>
Approved-by: Jarka Košanová <jarka@gitlab.com>
Reviewed-by: Eugenia Grieff <egrieff@gitlab.com>
Reviewed-by: Sebastian Rehm <srehm@gitlab.com>
Co-authored-by: Joseph Wambua <jjoshua@gitlab.com>