Revert "fix(issue-diff): Remove reference to invalid URL (#12545)" (#12548)

This reverts commit ae46a3deea35ce69e13bf9e6242b37144c596aeb.

src/sentry/static/sentry/app/components/issueDiff.jsx

@@ -92,6 +92,10 @@ class IssueDiff extends React.Component {
   }
 
   getEndpoint(issueId, eventId) {
+    if (eventId !== 'latest') {
+      return `/events/${eventId}/`;
+    }
+
     return `/issues/${issueId}/events/${eventId}/`;
   }