Add tests that use currently unused MR review page object methods
In gitlab-org/gitlab!21606 (merged) I removed some steps from a test to simplify it and fix flakiness.
However, I neglected to remove the page object methods and frontend code that was no longer used.
Proposal
Add coverage back in a separate test and try to ensure it's not flaky.
Include more coverage for common workflows involving diff comments (see gitlab-org/gitlab#235966 (closed))
Edited by Mark Lapierre