Fix failing dmr_test after remving unique constraint

The apache#46295 removed the unique constraints but the case when logical
date is None is not handled.

This one fixes the problem but likely needs some unit tests and
fixes in the core

providers/tests/amazon/aws/operators/test_dms.py

@@ -495,6 +495,7 @@ def test_template_fields_native(self, mock_conn, session):
             run_id="test",
             run_type=DagRunType.MANUAL,
             state=DagRunState.RUNNING,
+            logical_date=execution_date,
         )
         ti = TaskInstance(task=op)
         ti.dag_run = dag_run