add send audio function for tests

[SilasK]

This should help to test ideally in CI the backend
Example how I use it.

For now it uses a audio file as input. but later one could synthesize an audio file from text and then check how good the transcript is.

AUDIO_FILE="path/to/audio.wav"
connection_args="--host 0.0.0.0 --port 8002"


echo "#########################  Starting server #########################"

python whisper_fastapi_online_server.py \
--model small \
--lan fr \
--buffer_trimming sentence \
--log-level INFO \
--diarization true \
$connection_args  \
$arg &


# wait until server is up
sleep 7

echo "#########################  Starting client #########################"


python tests/send_audio_to_server.py \
$connection_args \
--audio-file AUDIO_FILE \
--duration-min 5.0