[normalizer] Move normalizer out of common package and inside libs

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

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

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

src/mednet/libs/segmentation/config/data/drive/datamodule.py

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

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

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

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

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

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

src/mednet/libs/segmentation/models/m2unet.py

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

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