Geomap: Support donut clustering

**Why is this needed**: I would like to use the map to display equipment state. Equipment can be densely colocated in the same space and can have different states (like available, offline, running, etc.). While the heatmap supports clustering it just does so by data density which doesn't help to distinguish the distribution of the different equipment states. **What would you like to be added**: A few years ago I wrote a custom dashboard using Leaflet.js with a plugin like this https://github.com/akq/Leaflet.DonutCluster to visualize something like that  Zooming in will then break up the cluster just like it happens with the heatmap currently. **Who is this feature for?** Mostly our service organization and R&D