Modify ProcessorTesterMixin for better generalization (#32637)

* Add padding="max_length" to tokenizer kwargs and change crop_size to size for image_processor kwargs

* remove crop_size argument in align processor tests to be coherent with base tests

* Add pad_token when loading tokenizer if needed, change test override tokenizer kwargs, remove unnecessary test overwrites in grounding dino

tests/models/align/test_processor_align.py

@@ -66,8 +66,6 @@ class AlignProcessorTest(ProcessorTesterMixin, unittest.TestCase):
         image_processor_map = {
             "do_resize": True,
             "size": 20,
-            "do_center_crop": True,
-            "crop_size": 18,
             "do_normalize": True,
             "image_mean": [0.48145466, 0.4578275, 0.40821073],
             "image_std": [0.26862954, 0.26130258, 0.27577711],