Merge branch 'project-overview-layout-reorganisation' into 'master'

Project overview page reoganisation: add sidebar

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137025



Merged-by: Vitaly Slobodin <vslobodin@gitlab.com>
Approved-by: Julia Miocene <jmiocene@gitlab.com>
Approved-by: Elwyn Benson <ebenson@gitlab.com>
Approved-by: Vitaly Slobodin <vslobodin@gitlab.com>
Reviewed-by: Sascha Eggenberger <seggenberger@gitlab.com>
Reviewed-by: Elwyn Benson <ebenson@gitlab.com>
Co-authored-by: Sascha Eggenberger <seggenberger@gitlab.com>
Co-authored-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>