Migrate discoveries from Covid dashboard

[danielfdsilva]

Migrate the following discoveries:

• Water quality Content: Water quality and covid 19 veda-config#231
• Climate change Content: Climate Change and COVID-19 veda-config#230
• Changing landscapes Content: Changing landscapes discovery veda-config#229

https://www.earthdata.nasa.gov/covid19/discoveries

Given that not all functionalities of the covid dashboard are available on VEDA (example the small multiple maps), we should use other approaches that make sense.
In the case of the changing landscapes discovery there are quite some datasets not available on VEDA. If necessary we can use screenshots from the covid dashboard as a temporary placeholder.

[danielfdsilva]

The water quality discovery is currently blocked, but work as started and further development can be tracked on that PR.
Considering this done