Use soundfile for mp3 decoding instead of torchaudio
As suggested by @severo:
> Use soundfile for mp3 decoding instead of torchaudio by @polinaeterna in https://github.com/huggingface/datasets/pull/5573
> 
>  - this allows to not have dependencies on pytorch to decode audio files
>  - this was possible with soundfile 0.12 which bundles libsndfile binaries at a recent version with MP3 support
Use soundfile for mp3 decoding instead of torchaudio: As suggested by @severo:
> Use soundfile for mp3 decoding instead of torchaudio by @polinaeterna in https://github.com/huggingface/datasets/pull/5573
> 
>  - this allows to not have dependencies on pytorch to decode audio files
>  - this was possible with soundfile 0.12 which bundles libsndfile binaries at a recent version with MP3 support