Add status dropdown to alert list view

What does this MR do?

Tiny MVC to add a status dropdown to the details view. #216312 (closed)

Next MR will udate dropdown when backend that makes it available is merged

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides