Merge pull request #6946 from taosdata/fix/TD-5429

[TD-5429]<hotfix>:executing group by test suite throws uninitialized semaphore error

src/client/src/tscUtil.c

@@ -3561,6 +3561,7 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, __async_cb_func_t
   pNew->pTscObj   = pSql->pTscObj;
   pNew->signature = pNew;
   pNew->sqlstr    = strdup(pSql->sqlstr);
+  tsem_init(&pNew->rspSem, 0, 0);
 
   SSqlCmd* pnCmd  = &pNew->cmd;
   memcpy(pnCmd, pCmd, sizeof(SSqlCmd));