[ENHANCEMENT]LiteLLM instrumentor add assistance message when calling OpenAI

[arizedatngo]

Initialize OpenAI auto-instrumentation

OpenAIInstrumentor().instrument()
session = px.launch_app()

configure the Phoenix tracer

tracer_provider = register(
project_name="my-llm-app",
endpoint="https://app.phoenix.arize.com/v1/traces",
)

from openinference.instrumentation.litellm import LiteLLMInstrumentor

LiteLLMInstrumentor().instrument(tracer_provider=tracer_provider)

[rohanbalkondekar]

Temporary fix for those who are facing this issue:

If you are using OpenAI with LiteLLM, you can simply use OpenAIInstrumentor instead of LiteLLMInstrumentor