Remove dependency on Spring HATEOAS

The project has a dependency on Spring HATEOAS for [the changelog generator](https://github.com/spring-projects/spring-ws/blob/0929ef64ffbae9e6e9c997f39dc4671688b744d9/spring-ws-core/src/test/java/org/springframework/ws/support/ChangelogCreator.java) that we no longer use since we moved to GitHub Actions.