* add check and prepare args for BC to ProcessorMixin, improve ProcessorTesterMixin
* change size and crop_size in processor kwargs tests to do_rescale and rescale_factor
* remove unnecessary llava processor kwargs test overwrite
* nit
* change data_arg_name to input_name
* Remove unnecessary test override
* Remove unnecessary tests Paligemma
* Move test_prepare_and_validate_optional_call_args to TesterMixin, add docstring