Separate Postgres into Config and Datasource DB.

[jonasumland]

No description provided.

[boehmchen]

At the moment we add datasets as table to the current postgres schema. If we generate many datasets the postgres schema gets overcrowded with dataset tables. It might be better to use another database schema for generated datasets and uploaded datasets to keep configuration tables like nodes, experiments_jobs, dataset_generations_jobs etc. separated from dataset tables.