fix(presto): use correct timespec for presto (apache#20333)

Author: mohittt27

superset/db_engine_specs/presto.py

@@ -761,7 +761,7 @@ def convert_dttm(
             utils.TemporalType.TIMESTAMP,
             utils.TemporalType.TIMESTAMP_WITH_TIME_ZONE,
         ):
-            return f"""TIMESTAMP '{dttm.isoformat(timespec="microseconds", sep=" ")}'"""
+            return f"""TIMESTAMP '{dttm.isoformat(timespec="milliseconds", sep=" ")}'"""
         return None
 
     @classmethod

tests/unit_tests/db_engine_specs/test_presto.py

@@ -30,17 +30,17 @@
         (
             "TIMESTAMP",
             datetime(2022, 1, 1, 1, 23, 45, 600000),
-            "TIMESTAMP '2022-01-01 01:23:45.600000'",
+            "TIMESTAMP '2022-01-01 01:23:45.600'",
         ),
         (
             "TIMESTAMP WITH TIME ZONE",
             datetime(2022, 1, 1, 1, 23, 45, 600000),
-            "TIMESTAMP '2022-01-01 01:23:45.600000'",
+            "TIMESTAMP '2022-01-01 01:23:45.600'",
         ),
         (
             "TIMESTAMP WITH TIME ZONE",
             datetime(2022, 1, 1, 1, 23, 45, 600000, tzinfo=pytz.UTC),
-            "TIMESTAMP '2022-01-01 01:23:45.600000+00:00'",
+            "TIMESTAMP '2022-01-01 01:23:45.600+00:00'",
         ),
     ],
 )