Merge branch 'psi-weight-wait' into 'master'

Add loading spinner for work item weight widget

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139045



Merged-by: Deepika Guliani <dguliani@gitlab.com>
Approved-by: Deepika Guliani <dguliani@gitlab.com>
Reviewed-by: Deepika Guliani <dguliani@gitlab.com>
Co-authored-by: Simon Knox <simon@gitlab.com>