Remove hardcoded bucket paths from the code

[valentina-s]

No description provided.

[scottveirs]

@valentina-s and @paulcretu Tackling this issue sooner than later might be valuable.

I'm hesitating to point the Microsoft hackathon folks towards this package before this issue is resolved. For now they are just hard-coding the new sponsored S3 buckets into their scripts, e.g. here -- https://github.com/orcasound/aifororcas-livesystem/blob/main/InferenceSystem/src/LiveInferenceOrchestrator.py#L145

Another high-level change we might consider is re-naming this repo to be agnostic to the audio data format, e.g. instead of orca-hls-utils to orca-audio-utils...