add test

Author: shruti2522

datafusion/sqllogictest/test_files/aggregate.slt

@@ -5075,6 +5075,12 @@ SELECT column3, column4, column1, avg(column1) OVER (PARTITION BY column3 ORDER
 FROM duration
 ORDER BY column3, column4;
 ----
+a 1 0 days 0 hours 0 mins 10 secs 0 days 0 hours 0 mins 10 secs
+a 2 0 days 0 hours 0 mins 20 secs 0 days 0 hours 0 mins 15 secs
+b 1 0 days 0 hours 0 mins 30 secs 0 days 0 hours 0 mins 30 secs
+b 2 0 days 0 hours 0 mins 40 secs 0 days 0 hours 0 mins 35 secs
+c 1 0 days 0 hours 0 mins 50 secs 0 days 0 hours 0 mins 50 secs
+c 2 0 days 0 hours 1 mins 0 secs 0 days 0 hours 0 mins 55 secs
 
 statement ok
 drop table duration;