fix legacy name converter bug (#55144)

paddle/fluid/ir_adaptor/translator/op_compat_info.h

@@ -93,6 +93,15 @@ class OpNameNormalizer {
         legacy_name.replace(pos, target.length(), data);
       }
       return legacy_name;
+    } else if (is_grad_op && !is_grad_arg) {
+      // backwward op using forward args: like trace_grad using forward input
+      std::string target = "_grad";
+
+      size_t type_pos = op_type.find(target);
+      std::string legacy_name =
+          this->GetLegacyArgName(op_type.substr(0, type_pos), arg_name);
+
+      return legacy_name;
     }
     if (op_arg_name_mappings.find(op_type) == op_arg_name_mappings.end()) {
       return UnderscoreToCamelCase(arg_name);