Python: Add test with unkown view class in django

python/ql/test/experimental/library-tests/frameworks/django-v2-v3/routing_test.py

@@ -140,3 +140,13 @@ def with_decorator(request, foo):  # $ requestHandler routedParameter=foo
 urlpatterns = [
     path("with_decorator/<foo>", with_decorator),  # $ routeSetup="with_decorator/<foo>"
 ]
+
+class UnknownViewSubclass(UnknownViewSuperclass):
+    # Although we don't know for certain that this class is a django view class, the fact that it's
+    # used with `as_view()` in the routing setup should be enough that we treat it as such.
+    def get(self, request): # $ MISSING: requestHandler
+        pass
+
+urlpatterns = [
+    path("UnknownViewSubclass/", UnknownViewSubclass.as_view()),  # $ routeSetup="UnknownViewSubclass/"
+]