Integrate deployment data into ECharts version of metrics graphs
We need to add in deployment data to our ECharts metrics graph integration. This will likely entail a redesign by the UX team and likely an additional ECharts series added into the area chart.
See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23459#note_122658417 for additional details
- Rocket icon marks the start of the deployment
- Deployment completion time listed in the popover