Example of Datastores team metrics - iteration WXX

(NOTE: This is just an example of how the Iteration WXX Datastores team metrics should look like)

1. Estimated days of work assigned to the team, vs. their capacity: 30 / 36
2. Issues planned vs issues closed: 9 / 9
3. Issues Unplanned we got in the Milestone: 3
4. Estimated hours planned vs closed: 30 / 30
5. # issues moved to other iterations, due to inaccurate planning: 3

[ time evolution graph to be placed here, when there is sufficient data ]

CC: gitlab-com/gl-infra/sre-datastores