Test: Fix ilLOTestRun is in Global Namespace

See: https://mantis.ilias.de/view.php?id=43268

components/ILIAS/Test/src/Results/Presentation/TitlesBuilder.php

@@ -272,7 +272,7 @@ private function isQualifyingTestPerObjective(): bool
         return true;
     }
 
-    private function getObjectiveTitle(ilLOTestRun $loRun)
+    private function getObjectiveTitle(\ilLOTestRun $loRun)
     {
         return \ilCourseObjective::lookupObjectiveTitle($loRun->getObjectiveId());
     }