Organize the data-transformers if SUT Type specific or General (and for what)

[VincenzoFerme]

E.g., have subfolders making clear that https://github.com/benchflow/data-transformers/blob/dev/data-transformers/transformers/mysqlTransformer.py applies only to WfMSs

Related to benchflow/analysers#94

Note: the Kafka topics should be updated accordingly