This MR adds a temporary button to be able to
download the Prometheus metrics from charts
to CSV format.

Pass keyname instead of translated string

This merge request adds an empty chart component
which will load in case of queries not having
data to display, this will override the current
logic, which hides all the graphs that have no
data to show

This introduces the single stat chart component aside from
the area chart component

Move a unit test to jest and use snapshot tests

Commit sha in deployment popovers within monitoring dashboard are
not clickable or selectable. This commit makes those commit sha
links selectable and point to projects commit page

First part of FE for Prometheus API
Dashboard endpoint fetches all info except for chart results
Renders empty groups after loading

On the metrics dashboard, always display the environment selector,
even if there is no data to display for that environment. This allows
the user to switch to the metrics dashboard of another environment.