[common] (datasets) robots@robots: adapt to the new format

...research/common/datasets_v3/image_file_dataset_builder.py

common/research/common/datasets_v3/iterator_dataset.py

.../research/common/datasets_v3/roco/roco_dataset_builder.py

common/research/common/datasets_v3/roco/roco_datasets.py

...mon/unittests/datasets/roco/test_directory_dataset_zoo.py

.../unittests/datasets_v3/roco/test_directory_dataset_zoo.py

common/tests/common/unittests/datasets_v3/test_dataset.py

...earch/robots_at_robots/armor_color/armor_color_dataset.py

...bots/armor_color/armor_color_pipeline_reporter_factory.py

...arch/robots_at_robots/armor_color/baseline_experiments.py

...earch/robots_at_robots/armor_digit/armor_digit_dataset.py

...bots/armor_digit/armor_digit_pipeline_reporter_factory.py

...arch/robots_at_robots/armor_digit/baseline_experiments.py

...esearch/robots_at_robots/dataset/armor_dataset_factory.py

.../research/robots_at_robots/dataset/armor_value_dataset.py

...rch/robots_at_robots/dataset/armor_value_dataset_cache.py

...robots_at_robots/dataset/armor_value_dataset_generator.py

...ch/robots_at_robots/dataset/armor_value_target_factory.py

...s-at-robots/research/robots_at_robots/demos/demo_infer.py

...t-robots/research/robots_at_robots/demos/demo_pipeline.py