Download CSV from Prometheus charts on the metrics dashboard
Problem to solve
In order to ensure that charts are accessible to screen-readers, we should allow for the downloading of CSV data from the chart so it can be fed into an application that will more accessible.
Users interacting with GitLab via screen-readers.
This issue will add in
Download csv option into the dropdown menu that we will create separately as part of https://gitlab.com/gitlab-org/gitlab-ce/issues/63197:
The first implementation of this issue with be fron-end only, respecting the limit of ~600 data points that allows us to load this with the chart and not fetch more data.