Project: datamanagement
Issue DM-3630: Change root to config in config override files
Implement RFC-62 by using {{config}} rather than {{root}} in config override files for the root of the config. Note that I propose not modifying astrometry_net_data configs because those are numerous and hidden. They have their own special loader in LoadAstrometryNetObjectsTask._readIndexFiles which could easily be updated later. if desired. An obvious time to make such a transition would be when overhauling the way this data is unpersisted.
Story points: 2