add teardown to delta test class as it also builds tests on alt schema

tests/functional/adapter/test_store_test_failures.py

@@ -51,6 +51,17 @@ def project_config_update(self):
             },
         }
 
+    @pytest.fixture(scope="function", autouse=True)
+    def teardown_method(self, project):
+        yield
+        with project.adapter.connection_named("__test"):
+            relation = project.adapter.Relation.create(
+                database=project.database,
+                schema=f"{project.test_schema}_{TEST_AUDIT_SCHEMA_SUFFIX}",
+            )
+
+            project.adapter.drop_schema(relation)
+
     def test_store_and_assert_failure_with_delta(self, project):
         self.run_tests_store_one_failure(project)
         self.run_tests_store_failures_and_assert(project)