Add Jakarta REST Request and Response return support

[arturobernalg]

Support jakarta.ws.rs.core.Response as a resource method return type,
including access to response metadata and entity decoding. Responses
declared as Response are returned to the caller even for non-successful
status codes.

[ok2c]

@arturobernalg Looks good overall. ClientRequest does not look very useful. I would drop it for now. I also would like to change the intermediate representation of the ClientResponse JSON content from byte array to JsonNode for better efficiency but this can be done as a separate change-set at a later point.