Introduce modular files for speech models (#35902)
* WAV_2_VEC_2 to WAV2VEC2
* added modular files for hubert, wavlm, wav2vec2_bert, data2vec_audio
* remove unnessary definitions in modulars
* added modular files for UniSpeech, UniSpeechSat, Wav2Vec2Conformer
* docstring fix for UniSpeechForCTC
* removed unneccessary re-definition of modular classes
* reverted lazy imports change on modular_model_converter, type-alias for Wav2Vec2BaseModelOutput
* top-level import of deepspeed in seamless_m4t, speecht5
* avoid tracking imports inside classes, relocate lazy deepspeed, peft imports in their original locations
* convert modular
* tiny modular typing fixes
* some more modular fixes
* make style
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Co-authored-by: eustlb <94853470+eustlb@users.noreply.github.com>
Co-authored-by: Eustache Le Bihan <eulebihan@gmail.com>
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