skip sync version of test_transaction_state too

Author: elprans

tests/test_sync_query.py

@@ -907,6 +907,9 @@ def test_sync_banned_transaction(self):
             self.client.execute('start transaction')
 
     def test_transaction_state(self):
+        # gel.errors.InternalServerError: relation "..." does not exist
+        # likely a server query cache bug
+        raise unittest.SkipTest("raises an ISE sometimes")
         with self.assertRaisesRegex(gel.QueryError, "cannot assign to.*id"):
             for tx in self.client.transaction():
                 with tx: