Rework add-new-model-like with modular and make test filenames coherent (#39612)

* remove tf/flax

* fix

* style

* Update add_new_model_like.py

* work in progress

* continue

* more cleanup

* simplify and first final version

* fixes -> it works

* add linter checks

* Update add_new_model_like.py

* fix

* add modular conversion at the end

* Update add_new_model_like.py

* add video processor

* Update add_new_model_like.py

* Update add_new_model_like.py

* Update add_new_model_like.py

* fix

* Update image_processing_auto.py

* Update image_processing_auto.py

* fix post rebase

* start test filenames replacement

* rename all test_processor -> test_processing

* fix copied from

* add docstrings

* Update add_new_model_like.py

* fix regex

* improve wording

* Update add_new_model_like.py

* Update add_new_model_like.py

* Update add_new_model_like.py

* start adding test

* fix

* fix

* proper first test

* tests

* fix

* fix

* fix

* fix

* modular can be used from anywhere

* protect import

* fix

* Update add_new_model_like.py

* fix

tests/models/chameleon/test_processing_chameleon.py

@@ -75,7 +75,7 @@ class ChameleonProcessorTest(ProcessorTesterMixin, unittest.TestCase):
     def prepare_processor_dict():
         return {"image_seq_length": 2}  # fmt: skip
 
-    # Copied from tests.models.llava.test_processor_llava.LlavaProcessorTest.test_get_num_vision_tokens
+    # Copied from tests.models.llava.test_processing_llava.LlavaProcessorTest.test_get_num_vision_tokens
     def test_get_num_vision_tokens(self):
         "Tests general functionality of the helper used internally in vLLM"