* Deprecate groupby from query_obj
* Fix query_object bug
* Fix histogram
* Remove groupby from legacy druid connector and fix first batch of unit tests
* Deprecate some unnecessary tests + fix a few others
* Address comments
* hide SIP-38 changes behind feature flag
* Break out further SIP-38 related tests
* Reslove test errors
* Add feature flag to QueryContext
* Resolve tests and bad rebase
* Backport recent changes from viz.py and fix broken DeckGL charts
* Fix bad rebase
* backport #9522 and address comments
Ville Brofeldt