This MR adds the functionality to download metrics data
as CSV. It also removes the exportMetricsToCsvEnabled feature
flag which was used before the dropdown was implemented to
display a button.

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

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

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

This merge request just adds the column chart
component without integrating it to the dashboard

This merge requests just adds the component without integrating it
to the dashboard, it adds tests as well

This changes the monitoring javascript store from
an object based to a vuex one

Resolves an issue where long series label names overflow
the popover chart tooltip container