Please repin litellm to >1.83 #6598

I'm getting security alerts for "LiteLLM: Authentication bypass via OIDC userinfo cache key collision". I'd like to ugprade however the google-cloud-aiplatform is pinning litellm to <1.82.6 (before the supply chain attack). Now that it's resolved, please repin it to a version afterwards so we can pick up the newer fixes.

Or just support the openai api directly and remove litellm