Merge branch '474915-hierarchy-widget-rollups-progress-hover' into 'master'

Show Progress percentage in rollup data

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/163885



Merged-by: Florie Guibert <fguibert@gitlab.com>
Approved-by: Nick Brandt <nbrandt@gitlab.com>
Approved-by: Rajan Mistry <rmistry@gitlab.com>
Approved-by: Florie Guibert <fguibert@gitlab.com>
Reviewed-by: Florie Guibert <fguibert@gitlab.com>
Co-authored-by: Deepika Guliani <dguliani@gitlab.com>