Add back deleted test case

Author: Anexen

tests/test_migration_operations.py

@@ -208,6 +208,15 @@ def test_migration_operations_add_partition(
                 model_name="test", name="pt1"
             ),
         ),
+        (
+            PostgresPartitioningMethod.LIST,
+            operations.PostgresAddListPartition(
+                model_name="test", name="pt1", values=["car", "boat"]
+            ),
+            operations.PostgresDeleteListPartition(
+                model_name="test", name="pt1"
+            ),
+        ),
         (
             PostgresPartitioningMethod.HASH,
             operations.PostgresAddHashPartition(