Add streaming and system role to Ollama provider.

Is fixed as part of https://git.drupalcode.org/project/ai/-/merge_requests/95

Automatically closed - issue fixed for 2 weeks with no activity.

We are doing some issue management housekeeping and adding/removing components.

The "Providers" component will be removed because providers have been moved into their own projects, so this issue is being moved to "Miscellaneous".

If we have a new project to move this to, we can also do that as a secondary step.

See 📌 Update AI module project components Active for more details.