Allow use of annotations on parameter of setter method, not just on method itself

Currently annotations for all methods, including setters, must be attached to method itself.
This works fine for existing use cases, but there are extensions where this would not work:

• If we allow multi-argument setters, one may need to customize parameters differently: and specifically @JacksonInject must be added to parameter
• There may be other integration cases where configuration of both return type and argument type(s) is needed: if so, return type can only be annotated via method, so annotations for arguments/parameters can not be attached to method.