Add agent monitoring support for `litellm`

[antonpirker]

LiteLLM (https://docs.litellm.ai/docs/) is an SDK that lets you use one API to access different LLMs.

Create an integration similar to what we do for Huggingface Hub.

PyPI: https://pypi.org/project/litellm/

[linear]

PY-1828 Add agent monitoring support for LiteLLM