Fix extending emit in event_hub_factory

What does this MR do?

This MR fixes an #223764 (closed) issue caused by !34242 (merged) where an incomplete thought was merged to master 😅

Screenshots

Before (comment throws an error because we expect flasy arg)	After (comment works)

Does this MR meet the acceptance criteria?

Conformity

• [ ] Changelog entry Not needed because fixes regression introduced in same milestone
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content