Make extract(timetz) tests a bit more interesting

Use a time zone offset with nonzero minutes to make the
timezone_minute test meaningful.

src/test/regress/expected/timetz.out

@@ -181,22 +181,22 @@ SELECT EXTRACT(DAY         FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-
 ERROR:  "time with time zone" units "day" not recognized
 SELECT EXTRACT(FORTNIGHT   FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');  -- error
 ERROR:  "time with time zone" units "fortnight" not recognized
-SELECT EXTRACT(TIMEZONE    FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
+SELECT EXTRACT(TIMEZONE    FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04:30');
  date_part 
 -----------
-    -14400
+    -16200
 (1 row)
 
-SELECT EXTRACT(TIMEZONE_HOUR   FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
+SELECT EXTRACT(TIMEZONE_HOUR   FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04:30');
  date_part 
 -----------
         -4
 (1 row)
 
-SELECT EXTRACT(TIMEZONE_MINUTE FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
+SELECT EXTRACT(TIMEZONE_MINUTE FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04:30');
  date_part 
 -----------
-         0
+       -30
 (1 row)
 
 SELECT EXTRACT(EPOCH       FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');

src/test/regress/sql/timetz.sql

@@ -66,7 +66,7 @@ SELECT EXTRACT(MINUTE      FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-
 SELECT EXTRACT(HOUR        FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
 SELECT EXTRACT(DAY         FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');  -- error
 SELECT EXTRACT(FORTNIGHT   FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');  -- error
-SELECT EXTRACT(TIMEZONE    FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
-SELECT EXTRACT(TIMEZONE_HOUR   FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
-SELECT EXTRACT(TIMEZONE_MINUTE FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');
+SELECT EXTRACT(TIMEZONE    FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04:30');
+SELECT EXTRACT(TIMEZONE_HOUR   FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04:30');
+SELECT EXTRACT(TIMEZONE_MINUTE FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04:30');
 SELECT EXTRACT(EPOCH       FROM TIME WITH TIME ZONE '2020-05-26 13:30:25.575401-04');