Making CTC training example more general (#28582)
* add w2v2bert compatibility
* Update examples/pytorch/speech-recognition/run_speech_recognition_ctc.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
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Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
