[ci] Skip memory impact analysis for release and beta branches (#11740)

tests/script/test_helpers.py

@@ -31,6 +31,13 @@ print_file_list = helpers.print_file_list
 get_all_dependencies = helpers.get_all_dependencies
 
 
+@pytest.fixture(autouse=True)
+def clear_helpers_cache() -> None:
+    """Clear cached functions before each test."""
+    helpers._get_github_event_data.cache_clear()
+    helpers._get_changed_files_github_actions.cache_clear()
+
+
 @pytest.mark.parametrize(
     ("github_ref", "expected_pr_number"),
     [