Add French Multilingual Librispeech

[yaya-sy]

Extract the French subset in the Multilingual Librispeech dataset (https://huggingface.co/datasets/facebook/multilingual_librispeech). The resulting data must look like this:

{
   'audio': the audio file,
   'text": the transcription of the audio
}

Then, you can push the dataset to HuggingFace.

[abheesht17]

https://huggingface.co/datasets/abheesht/librispeech_fr

CC: @Adithya-MN