Improve Ollama tool use (#30120)

<img width="458" alt="Screenshot 2025-05-07 at 9 37 39 AM"
src="https://github.com/user-attachments/assets/80f8a9b8-6a13-4e84-b91d-140e11475638"
/>

<img width="603" alt="Screenshot 2025-05-07 at 9 37 33 AM"
src="https://github.com/user-attachments/assets/7fe67a68-3885-4a0e-a282-aad37e92068b"
/>


Release Notes:

- Ollama models no longer require the supports_tools field in settings
(defaults to false)

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

crates/assistant_settings/src/assistant_settings.rs

@@ -366,7 +366,7 @@ impl AssistantSettingsContent {
                                     &model,
                                     None,
                                     None,
-                                    language_model.supports_tools(),
+                                    Some(language_model.supports_tools()),
                                 )),
                                 api_url,
                             });