Improve process_view() methods (#2556)

I noticed whilst working on the new process_view() added in #2555 that these two were inconsistent and incomplete, so expanding them now.

Author: adamchainz

django-stubs/contrib/admindocs/middleware.pyi

@@ -10,6 +10,6 @@ class XViewMiddleware(MiddlewareMixin):
         self,
         request: HttpRequest,
         view_func: Callable[..., HttpResponseBase],
-        view_args: tuple,
-        view_kwargs: dict[Any, Any],
+        view_args: tuple[Any, ...],
+        view_kwargs: dict[str, Any],
     ) -> HttpResponse | None: ...

django-stubs/middleware/csrf.pyi

@@ -49,7 +49,11 @@ class CsrfViewMiddleware(MiddlewareMixin):
     def allowed_origin_subdomains(self) -> defaultdict[str, list[str]]: ...
     def process_request(self, request: HttpRequest) -> None: ...
     def process_view(
-        self, request: HttpRequest, callback: Callable | None, callback_args: tuple, callback_kwargs: dict[str, Any]
+        self,
+        request: HttpRequest,
+        callback: Callable[..., HttpResponseBase],
+        callback_args: tuple[Any, ...],
+        callback_kwargs: dict[str, Any],
     ) -> HttpResponseForbidden | None: ...
     def process_response(self, request: HttpRequest, response: HttpResponseBase) -> HttpResponseBase: ...