fix(bug): database migration does not rollback schema version on hook failure (#5908)

* add tests

* correct expect schema version

* use conventional named return

* add rollback test and more description in godoc

* refactor to use commit at the end and defer rollback

* add comment

* lint

internal/db/schema/testdata/hooks/updated/2/01_another_update.up.sql

@@ -0,0 +1,8 @@
+-- Copyright (c) HashiCorp, Inc.
+-- SPDX-License-Identifier: BUSL-1.1
+
+begin;
+    create table test_five (
+      id tt_public_id primary key
+    );
+commit;