Fix audio data in pagination of audio datasets
Currently pagination is only enabled for testing purposes on [arabic_speech_corpus](https://huggingface.co/datasets/arabic_speech_corpus) but times out because the "transform to list" step that writes the audio files to disk takes too much time.

Currently it writes both MP3 and WAV - but we should find which one is faster and only write this one.

This is not super high prio for now though, since there aren't a lot of audio dataset with pagination
Fix audio data in pagination of audio datasets: Currently pagination is only enabled for testing purposes on [arabic_speech_corpus](https://huggingface.co/datasets/arabic_speech_corpus) but times out because the "transform to list" step that writes the audio files to disk takes too much time.

Currently it writes both MP3 and WAV - but we should find which one is faster and only write this one.

This is not super high prio for now though, since there aren't a lot of audio dataset with pagination