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