Fixes https://github.com/spring-projects/spring-integration/pull/3660 * Change the `LambdaMessageProcessor` to invoke `Function`, `GenericHandler`, `GenericSelector` & `GenericTransformer` explicitly without reflection. This allows to avoid `--add-opens` for Java types to be used from reflections. Plus this removes some overhead with native images. And in general it is faster than reflection invocation.