Disabling a failing test in nightly.

PiperOrigin-RevId: 591364183
Change-Id: I76a91aaf5eae6dbe5f38790fa186020db631012b

Author: esonghori

broken_tests.txt

@@ -2,4 +2,5 @@ agents.cql.cql_sac_agent_test  # b/239448722
 environments.suite_atari_test # b/201537188
 examples.cql_sac.kumar20.dataset.file_utils_test  # b/199583100
 examples.cql_sac.kumar20.dataset.dataset_utils_test  # b/199583100
-examples.cql_sac.kumar20.cql_sac_train_eval_test  # b/199583100
+examples.cql_sac.kumar20.cql_sac_train_eval_test  # b/199583100
+policies.policy_saver_test  # b/315708156