[5.5] Change order of checks in JsonResponse

[rodrigopedra]

As stated in #21079 if you have a class implementing both Arrayable and Jsonable interface and have different returns for its toArray() and toJson() methods, the JsonResponse will prefer the toArray() return over toJson() return.

Before #17875, as the check was done inside the Response, the Jsonable implementation was checked before the Arrayable. So if we didn't explicitly returned a JsonResponse this wasn't a problem at all.

But after #17875 the Router checks the response type and creates a new JsonResponse which have a different logic as described above.

This PR brings the type-checking logic in JsonResponse to behave more likely as Response (check first for Jsonable then for Arrayable).

Please refer to #21079 for an example with different implementations of toArray() and toJson()