[common] (image) make Image a type alias

common/polystar/common/models/image.py

common/polystar/common/models/image_annotation.py

common/research/common/dataset/perturbations/perturbator.py

common/research/common/dataset/perturbations/utils.py

common/research/common/dataset/roco_dataset.py

common/research/common/datasets/image_dataset.py

...n/research/common/datasets/roco/directory_roco_dataset.py

...mmon/image_pipeline_evaluation/image_dataset_generator.py

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

...t-runes/research/robots_at_runes/dataset/labeled_image.py