Add test to restore transactions behavior.

tests/unit/test_renamed_relations.py

@@ -0,0 +1,15 @@
+from dbt.adapters.redshift.relation import RedshiftRelation
+from dbt.adapters.contracts.relation import RelationType
+
+
+def test_renameable_relation():
+    relation = RedshiftRelation.create(
+        database="my_db",
+        schema="my_schema",
+        identifier="my_table",
+        type=RelationType.Table,
+    )
+    assert relation.renameable_relations == frozenset({
+        RelationType.View,
+        RelationType.Table
+    })