Add project level value streams dashboard

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/164158



Merged-by: Brandon Labuschagne <blabuschagne@gitlab.com>
Approved-by: Brandon Labuschagne <blabuschagne@gitlab.com>
Co-authored-by: Ezekiel Kigbo <ekigbo@gitlab.com>