Detect interface parameter annotations also from spring-messaging HandlerMethod

[robert-engel]

Affects: all versions

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For spring-web support was added which allows controller methods to inherit the annotations on parameters from interfaces. See #15682 and 790d515

For spring-messaging this is not currently possible. It would be very nice if that could be possible there as well.

[jhoeller]

Implemented through extracting a common AnnotatedMethod base class from both of our HandlerMethod variants, managing the entire annotation introspection arrangement including the exposure of interface parameter annotations.

Thanks for raising this! It has been on our wishlist for a while but we never got around to it before.