[v5] 🚨Refactor subprocessors handling in processors (#41633)
* remove attributes and add all missing sub processors to their auto classes
* remove all mentions of .attributes
* cleanup
* fix processor tests
* fix modular
* remove last attributes
* fixup
* fixes after merge
* fix wrong tokenizer in auto florence2
* fix missing audio_processor + nits
* Override __init__ in NewProcessor and change hf-internal-testing-repo (temporarily)
* fix auto tokenizer test
* add init to markup_lm
* update CustomProcessor in custom_processing
* remove print
* nit
* fix test modeling owlv2
* fix test_processing_layoutxlm
* Fix owlv2, wav2vec2, markuplm, voxtral issues
* add support for loading and saving multiple tokenizer natively
* remove exclude_attributes from save_pretrained
* modifs after review