Add API authorization to YOLOv4 server

[bgoelTT]

Currently the YOLOv4 server lacks API key authorization for it's main inference request endpoint. This needs to be added and should use a similar system to the other servers (see TT-Metal Llama 3.1 70B, and TT-Metal Mistral 7B). This system uses a JWT (JSON Web Token) to encode information in the "Authorization" header.

See

tt-inference-server/tt-metal-llama3-70b/src/inference_api_server.py

Line 474 in dddad09

def read_authorization(

for how API authentication works on the server and https://github.com/tenstorrent/tt-inference-server/blob/main/tt-metal-llama3-70b/README.md#jwt_token-authorization for how to send requests with the corresponding API key