JIRA: https://jira.spring.io/browse/INT-4518 * Fix `BridgeFromAnnotationPostProcessor` do not resolve `outputChannel` for the target `BridgeHandler` * Rework logic in the `AbstractMethodAnnotationPostProcessor` to do not resolve a `MessageHandler` bean from the `@Bean` method when we can just check a method return type. * Check `BeanDefinition` instead of real bean when we consult for conditions **Cherry-pick to 5.0.x**