To hide the gutter_context_menu in collab notes (where it would be empty
anyway) we checked for the collaboration_hub. But that is unrelated to
collab notes it turns out :)

So now we check for the presence of a project which is always false for
collab notes.

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #54559

Release Notes:

- N/A Fixed context menu in the editor gutter not showing when there was
a break-point set but breakpoints are not shown in the buffer.