[TD-3969]<fix>: taosdemo re-enable batch-create-tbl-num (#5932)

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -3657,7 +3657,6 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
         goto PARSE_OVER;
       }
 
-      /*
       cJSON* batchCreateTbl = cJSON_GetObjectItem(stbInfo, "batch_create_tbl_num");
       if (batchCreateTbl && batchCreateTbl->type == cJSON_Number) {
         g_Dbs.db[i].superTbls[j].batchCreateTableNum = batchCreateTbl->valueint;
@@ -3667,7 +3666,6 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
         printf("ERROR: failed to read json, batch_create_tbl_num not found\n");
         goto PARSE_OVER;
       }
-      */
 
       cJSON *childTblExists = cJSON_GetObjectItem(stbInfo, "child_table_exists"); // yes, no
       if (childTblExists