Add Test Suite

[juanmc2005]

Changelog

• Add quantized ONNX versions of pyannote/segmentation and pyannote/embedding for testing (under assets/models)
• Add a test audio file under tests/data/audio
• Add expected RTTM files under tests/data/rttm
• Add unit tests for DelayedAggregation
• Add unit tests for SpeakerDiarization
• Add end-to-end test for StreamingInference
• Add GitHub action to run pytest on all PRs to main and develop
• Replace remote models with the new quantized ONNX models in previous GitHub actions so that no huggingface secret key is required

cc @sneakers-the-rat what do you think?

[sneakers-the-rat]

Looks great!!!!