[pytest] create session-scoped django.test.Client fixture

collector/conftest.py

@@ -1,5 +1,12 @@
 import pytest
+from django.test import Client
+
 
 @pytest.fixture(autouse=True)
 def enable_db_access_for_all_tests(db):
     pass
+
+
+@pytest.fixture(scope="session", name="session")
+def fixture_longlived_client() -> Client:
+    return Client()