language_models: Update default/recommended Anthropic models to Claude Sonnet 4 (#31209)

This PR updates the default/recommended models for the Anthropic and Zed
providers to be Claude Sonnet 4.

Release Notes:

- Updated default/recommended Anthropic models to Claude Sonnet 4.
37047a6fdeMarshall Bowers committed on 5/22/2025, 7:10:08 PM· committed by GitHubparentfc78408
3 files changedLine totals unavailable