faster_whisper and openai_whisper have differently formatted responses

[bscholer]

While looking into this issue, I noticed that faster_whisper and openai_whisper now respond in different formats when output=json.

It looks like ASR_ENGINE=openai_whisper returns a structure that looks like this (notice the named fields in the segments array):

On the other hand, ASR_ENGINE=faster_whisper instead returns a structure that looks like this (notice the lack of named fields in segments).

I think it goes without saying, but the format used by openai_whisper offers a significantly improved DX. I'm not sure what is involved in getting faster_whisper to respond with similarly formatted JSON, but that strikes me as the path forward.