Latency routing for AOAI in APIM

When AOAI request takes longer than specified amount of time use 'forward request' policy to reroute to a different AOAI endpoint.

Start by locating the Azure API Management policy examples or entry points for AOAI requests and review how the 'forward request' policy targets alternate AOAI endpoints. Done means requests exceeding a configured latency threshold are routed to the different endpoint, with the threshold and fallback behavior demonstrated in the relevant example or test.

Written by the indexing model from the issue text.