fix: Skip tests parametrized with None on Python 3.7

Simplify the check to just skip any test parametrized with None value.
On Python 3.7, create_asgi_app is always None due to the conditional
import, so this catches all async-related parametrized tests.

Author: taeold

conftest.py

@@ -78,11 +78,8 @@ def pytest_collection_modifyitems(config, items):
                 ):
                     skip_test = True
                     break
-                # Check if test is parametrized with create_asgi_app
-                if (
-                    hasattr(param_value, "__name__")
-                    and param_value.__name__ == "create_asgi_app"
-                ):
+                # Skip tests parametrized with None (create_asgi_app on Python 3.7)
+                if param_value is None:
                     skip_test = True
                     break