Support group_id transfer of ddl task with serlize_message

src/rootserver/ddl_task/ob_column_redefinition_task.h

@@ -36,6 +36,7 @@ public:
       const int64_t dest_table_id,
       const int64_t schema_version,
       const int64_t parallelism,
+      const int64_t consumer_group_id,
       const obrpc::ObAlterTableArg &alter_table_arg,
       const int64_t task_status = share::ObDDLTaskStatus::PREPARE,
       const int64_t snapshot_version = 0);