Merge pull request #67298 from Splizard/fix_unamed_args_gdextension

Fix _unnamed_arg so that arguments defined by GDExtension show up in the editor docs.

core/object/method_bind.cpp

@@ -63,7 +63,9 @@ PropertyInfo MethodBind::get_argument_info(int p_argument) const {
 
 	PropertyInfo info = _gen_argument_type_info(p_argument);
 #ifdef DEBUG_METHODS_ENABLED
-	info.name = p_argument < arg_names.size() ? String(arg_names[p_argument]) : String("_unnamed_arg" + itos(p_argument));
+	if (info.name.is_empty()) {
+		info.name = p_argument < arg_names.size() ? String(arg_names[p_argument]) : String("_unnamed_arg" + itos(p_argument));
+	}
 #endif
 	return info;
 }