Storages: fix UT ParsePushDownExecutorTest.TimestampColumn when local timezone is UTC (#10136)

ref #6233

Signed-off-by: Lloyd-Pottiger <[email protected]>

Author: Lloyd-Pottiger

dbms/src/Storages/tests/gtests_parse_push_down_filter.cpp

@@ -733,9 +733,10 @@ try
     // origin_time_stamp: 1802216106174185472
 
     {
-        // Greater between TimeStamp col and Datetime literal, use local timezone
+        // Greater between TimeStamp col and Datetime literal, use Asia/Shanghai timezone
         auto ctx = TiFlashTestEnv::getContext();
         auto & timezone_info = ctx->getTimezoneInfo();
+        timezone_info.resetByTimezoneName("Asia/Shanghai");
         convertTimeZone(origin_time_stamp, converted_time, *timezone_info.timezone, time_zone_utc);
         // converted_time: 0