fix das retry thread deadlock

src/observer/mysql/obmp_query.cpp

@@ -580,6 +580,7 @@ OB_NOINLINE int ObMPQuery::process_with_tmp_context(ObSQLSessionInfo &session,
                                                     bool &need_disconnect)
 {
   int ret = OB_SUCCESS;
+  oceanbase::lib::Thread::WaitGuard guard(oceanbase::lib::Thread::WAIT_FOR_LOCAL_RETRY);
   //create a temporary memory context to process retry or the rest sql of multi-query,
   //avoid memory dynamic leaks caused by query retry or too many multi-query items
   lib::ContextParam param;