Merge branch '473330-wi-create-view-weight' into 'master'

Add weight widget to Work Item create view

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167368



Merged-by: Simon Knox <simon@gitlab.com>
Approved-by: Nick Brandt <nbrandt@gitlab.com>
Approved-by: Simon Knox <simon@gitlab.com>
Reviewed-by: Simon Knox <simon@gitlab.com>
Reviewed-by: Deepika Guliani <dguliani@gitlab.com>
Co-authored-by: Fernanda Toledo <ftoledo@gitlab.com>