Show completed deliverables per milestone in addition to missed deliverables

• Group level: https://119-completed-deliverables-review.quality-dashboard.gitlap.com/groups/gitlab-org/completed_deliverables_per_milestone
• Project level: https://119-completed-deliverables-review.quality-dashboard.gitlap.com/groups/gitlab-org/projects/gitlab-ce/completed_deliverables_per_milestone
• DevOps Stage level: https://119-completed-deliverables-review.quality-dashboard.gitlap.com/groups/gitlab-org/stages/devops::manage
• DevOps Group level: https://119-completed-deliverables-review.quality-dashboard.gitlap.com/groups/gitlab-org/sections/group::access