[docstring] Fix `UniSpeech`, `UniSpeechSat`, `Wav2Vec2ForCTC` (#26664)
* Remove UniSpeechConfig
* Remove , at the end otherwise check_docstring changes order
* Auto add new docstring
* Update docstring for UniSpeechConfig
* Remove from check_docstrings
* Remove UniSpeechSatConfig and UniSpeechSatForCTC from check_docstrings
* Remove , at the end
* Fix docstring
* Update docstring for Wav2Vec2ForCTC
* Update Wav2Vec2ForCTC docstring
Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>
* fix style
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Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>