Large modular logic refactoring (#34487)
* rework converter
* Update modular_model_converter.py
* Update modular_model_converter.py
* Update modular_model_converter.py
* Update modular_model_converter.py
* cleaning
* cleaning
* finalize imports
* imports
* Update modular_model_converter.py
* Better renaming to avoid visiting same file multiple times
* start converting files
* style
* address most comments
* style
* remove unused stuff in get_needed_imports
* style
* move class dependency functions outside class
* Move main functions outside class
* style
* Update modular_model_converter.py
* rename func
* add augmented dependencies
* Update modular_model_converter.py
* Add types_to_file_type + tweak annotation handling
* Allow assignment dependency mapping + fix regex
* style + update modular examples
* fix modular_roberta example (wrong redefinition of __init__)
* slightly correct order in which dependencies will appear
* style
* review comments
* Performance + better handling of dependencies when they are imported
* style
* Add advanced new classes capabilities
* style
* add forgotten check
* Update modeling_llava_next_video.py
* Add prority list ordering in check_conversion as well
* Update check_modular_conversion.py
* Update configuration_gemma.py
