UDF generator refactor: replace `generate_udf_queries` with class
Created by: jassak
- Change UDF generator API (see 3e10bd7a4f03f5f677513f374fa28bca2bf57fd1 for details) (756)
- Rewrite parts of
mipengine/node/tasks/udfs.py
to comply with the new API (756) - Reorganize loose functions in
udfgenerator.py
into classes - Skip tests using
DummyEncoder
(see 441571da8999d80a2f0b8f5213ba80016a4e0dfc for details) - Small fix in
preprocessing.FormulaTransformer