Fixes https://github.com/spring-projects/spring-integration/issues/8611 According to the latest Spring Framework requirements related to AOT the `BeanDefinitionRegistryPostProcessor` must not do anything but only bean registrations * Extract a `MessagingAnnotationBeanPostProcessor` component with a `BeanPostProcessor` logic from the `MessagingAnnotationPostProcessor` and leave the last one as just a `BeanDefinitionRegistryPostProcessor` impl * Fix tests according to a new logic