Explore replacing python3 ollama puller with "podman artifact pull"

We wrote an ollama puller from scratch in python3, it's like 2 http requests. But the final request is like a "podman artifact pull", explore if we can replace this pull with "podman artifact pull"

Potential benefits:

• pushing Ollama artifact to OCI registry without conversion steps
• we can take advantage of authentication code in podman and in general the great compatibility podman has with many types of OCI registries