Metrics dashboard empty states

[jgiardino]

Our first pass at a metrics dashboard has empty states display per card/chart. Lucia worked on an alternate approach that shows how empty states could display for the entire dashboard or section in a dashboard. When discussing this approach with other UXDers who work on charts in clouddot, this approach is consistent with their implementations.
The design is visible here: https://docs.google.com/presentation/d/1NhsTMyzXcsOuhofFUyR3HVdvw67ZzvZd8ypNf-SJfZY/edit#slide=id.gda79fb04cc_0_0

And examples are pasted below: