TEMP: Workaround for unittests failing during shutdown

Using quick_exit instead of return/exit avoids calling all cleanup functions,
which fail due to a bug in rmw_fastrtps_cpp.

core/test/test_move_relative.cpp

@@ -133,5 +133,6 @@ int main(int argc, char** argv) {
 	testing::InitGoogleTest(&argc, argv);
 	rclcpp::init(argc, argv);
 
-	return RUN_ALL_TESTS();
+	// Using quick_exit to avoid calling cleanup functions, which cause a segfault in rmw
+	quick_exit(RUN_ALL_TESTS());
 }

visualization/motion_planning_tasks/test/test_task_model.cpp

@@ -239,5 +239,6 @@ int main(int argc, char** argv) {
 		auto test_result = RUN_ALL_TESTS();
 		app.exit(test_result);
 	});
-	return app.exec();
+	// Using quick_exit to avoid calling cleanup functions, which cause a segfault in rmw
+	quick_exit(app.exec());
 }