cloud_llm_client: Add another `Plan` variant (#37852)

This PR adds a corresponding `FreeV2` variant to the `Plan`.

Release Notes:

- N/A
ad02f6b9e3Marshall Bowers committed on 9/9/2025, 3:51:22 PM· committed by GitHubparent2e7607c
10 files changedLine totals unavailable