Fix pytest 8.0 and newer compatibility for App Engine tests.
Update the pytest_ignore_collect() hook to use the collection_path
argument instead of the deprecated path argument. Skip legacy Google
App Engine tests when the App Engine SDK is not configured.
--- ../tests/contrib/appengine/conftest.py	2026-10-16 14:12:08.999765366 +0300
+++ ../tests/contrib/appengine/conftest.py	2026-10-16 19:16:35.793289560 +0300
@@ -46,8 +46,9 @@
         set_up_gae_environment(config.getoption('gae_sdk'))
 
 
-def pytest_ignore_collect(path, config):
-    """Skip App Engine tests when --gae-sdk is not specified."""
+def pytest_ignore_collect(collection_path, config):
+    """Skip App Engine tests when the legacy SDK is not configured."""
     return (
-        'contrib/appengine' in str(path) and
-        config.getoption('gae_sdk') is None)
+        config.getoption('gae_sdk') is None
+        and collection_path.name.startswith('test_')
+    )