Adds a smoke test for closing an issue

What does this MR do?

Adds a smoke test for closing an issue. This reliable test gap came to light because of this regression.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content