* feat: deprecate /superset/validate_sql_json migrate to api v1
* use new error handling
* migrate SQLLAb frontend and add tests
* debug test
* debug test
* fix frontend test on sqllab
* fix tests
* fix frontend test on sqllab
* fix tests
* fix tests
* fix tests
* fix tests
* fix: feature flags typing
* fix tests
* add note in UPDATING.md
* fix frontend
* also move SCHEDULED_QUERIES to top level
* fix test
Co-authored-by: Ville Brofeldt <ville.v.brofeldt@gmail.com>