Merge branch...

Merge branch 'kassio/work-items-rolledup-dates-on-adding-existing-work_item-to-hierarchy' into 'master' 

WorkItems: Rolledup dates when adding an existing work item hierarchy

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/147984



Merged-by: Eugenia Grieff <egrieff@gitlab.com>
Approved-by: Alexandru Croitor <acroitor@gitlab.com>
Approved-by: Eugenia Grieff <egrieff@gitlab.com>
Reviewed-by: Kassio Borges <kborges@gitlab.com>
Reviewed-by: Alexandru Croitor <acroitor@gitlab.com>
Reviewed-by: Eugenia Grieff <egrieff@gitlab.com>
Co-authored-by: Kassio Borges <kassioborgesm@gmail.com>