[segmentation.datamodule] Make sample() return two dicts

...ednet/libs/segmentation/config/data/avdrive/datamodule.py

...dnet/libs/segmentation/config/data/chasedb1/datamodule.py

src/mednet/libs/segmentation/config/data/cxr8/datamodule.py

...ednet/libs/segmentation/config/data/drhagis/datamodule.py

...dnet/libs/segmentation/config/data/drionsdb/datamodule.py

...et/libs/segmentation/config/data/drishtigs1/datamodule.py

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

...mednet/libs/segmentation/config/data/iostar/datamodule.py

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

...et/libs/segmentation/config/data/montgomery/datamodule.py

...mednet/libs/segmentation/config/data/refuge/datamodule.py

...dnet/libs/segmentation/config/data/rimoner3/datamodule.py

...dnet/libs/segmentation/config/data/shenzhen/datamodule.py

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