Add a property dev.resteasy.sse.closed.response.code=200 to the Jakarta REST TCK

[jamezp]

A change in RESTEasy will require adding the -Ddev.resteasy.sse.closed.response.code=200 to the TCK.

The reason is RESTEasy was handling 204 responses incorrectly. The issue is RESTEasy returns a 204 when the SseEventSink is closed, see jakartaee/rest#1007. Other implementations seem to return 200. For this reason a configuration property was added so that the return code could be defined. The TCK itself expects a 200 which is the reason this property is being added.