AuthorizationDenied and Granted EventListeners Should Support Generics

[jzheaux]

It would be nice if users could listen for authorization events specific to the type of source:

@EventListener
public void onEvent(AuthorizationDeniedEvent<MethodInvocation> event) {
    // ...
}

One way this can be done is by having AuthorizationDeniedEvent and AuthorizationGrantedEvent implement ResolvableTypeProvider:

ResolvableType type = ResolvableType.forClassWithGenerics(getClass(), ResolvableType.forInstance(getObject()));

[franticticktick]

Hi @jzheaux, i would like to work on this ticket, could you assign it to me please?