Implement PostgreSQL load balancing options for Geo database
Spun out from #1004 (closed), we should confirm functionality and expose configuration for database load balancing for Geo nodes.
globals.geo.psql allows only a single host to be provided.
The Geo tracking database can be configured to use load balancing
- Chart: 4.1.0
- Confirm compatibility with Geo
- Port work for primary application database to Geo (see !1414 (merged))