Python: Verify that Ollama and LLM Studio work with OpenAI Connector

[alliscode]

Ollama and LLM Studio should work with the current OpenAI connector but we need to verify this.

[moonbox3]

This is a good opportunity to update our connector to use the Ollama Python SDK, which we aren't using right now.

[moonbox3]

https://github.com/ollama/ollama-python

[TaoChenOSU]

This is a good opportunity to update our connector to use the Ollama Python SDK, which we aren't using right now.

Item that tracks the migration: #6841 (comment)