[FEATURE] need more freedom to input post url for AZURE

Describe the feature you'd like

currently the Azure wrapper assumes that the endpoint follows this format :

https://{your-resource-name}.openai.azure.com/openai/deployments/{deployment-id}/chat/completions?api-version={api-version}

but it could be that the endpoint follows this format :

https://eastus2.api.cognitive.microsoft.com/

especially for the 32K preview/private open ai model(s)

you it would be nice to have control over the base url , actually the whole url, and maybe point the user to the playground where they can copy their entire url

Additional context