[3d-cnn/visceral] Adequate database and model to new-style datamodule/model

...dnet/libs/classification/config/data/visceral/__init__.py

...et/libs/classification/config/data/visceral/datamodule.py

...net/libs/classification/config/data/visceral/default.json

...ednet/libs/classification/config/data/visceral/default.py

src/mednet/libs/classification/data/typing.py

...mednet/libs/classification/models/classification_model.py

src/mednet/libs/classification/models/cnn3d.py

src/mednet/libs/common/models/model.py

src/mednet/libs/segmentation/models/segmentation_model.py