log and return error code instead of throwing

Co-authored-by: Tomoya Fujita <[email protected]>
Signed-off-by: Adam Aposhian <[email protected]>

rclcpp_components/src/node_main.cpp.in

@@ -63,7 +63,8 @@ int main(int argc, char * argv[])
   }
 
   if (exec.get_all_callback_groups().empty()) {
-    throw std::runtime_error("No matching class found");
+    RCLCPP_ERROR(logger, "No matching class found");
+    return 1;
   }
 
   exec.spin();