Add full test coverage for hand raise lead submissions

What does this MR do and why?

Add full test coverage for hand raise lead submissions

• ensure test coverage for further refactorings during work on #443674
• refactor/DRY things up as needed.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

new tests covering:

trial status popover

trial_discover_page

Related to #443674

Related to #457249 (closed)