chore: fixed time zone on shanghai to fix flasky 02_0079_function_interval.test (#18930)

Author: KKould

tests/sqllogictests/suites/query/functions/02_0079_function_interval.test

@@ -309,6 +309,9 @@ Charlie 1995-07-22 1995-07-22 00:00:00.000000 29 years 10 months 21 days 29 10 2
 statement ok
 unset timezone;
 
+statement ok
+set timezone='Asia/Shanghai'
+
 query T
 select age(to_timestamp_tz(today()), '2022-02-02 01:00:00 +0800'::timestamp_tz)=age('2022-02-02 01:00:00 +0800'::timestamp_tz);
 ----