only assert go package if generating go types

Author: MOmarMiraj

cli/src/main.rs

@@ -256,7 +256,10 @@ fn override_configuration(mut config: Config, options: &Args) -> anyhow::Result<
         if let Some(go_package) = options.go_package.as_ref() {
             config.go.package = go_package.to_string();
         }
-        assert_go_package_present(&config)?;
+        
+        if let Some(go_lang) = options.language {
+            assert_go_package_present(&config)?;
+        }
     }
 
     config.target_os = options.target_os.as_deref().unwrap_or_default().to_vec();