[tests] Revamp tests for montgomery, shenzhen, indian, and tbx11k; Erase tests for outdated RS modules

Some tests have been updated, while other which are still a work in
progress have been marked with @pytest.mark.skip(reason="Test need to be updated")

Maxime DELITROZ authored 1 year ago and André Anjos committed 1 year ago

We decided to handle the resizing of the input at the model level and not at the dataset level anymore. Loaders, docstrings and tests of Shenzhen and Montgomery were updated accordingly to only load data, remove black borders and crop to square shape. [image_utils.RemoveBlackBorders] had to be modified to allow functional utilization