The workload mongos_network_overload_test_workload_execution intentionally overloads a mongos, which in the mongotune-perf-3-shard.arm.aws.2023-11 variant now runs with the in development mongos load shedding policy. Load shedding can fail a serverStatus the test runs here which leads to adding None to a number in the locust library, failing the test. This workload should be made resilient to load shedding. Or if the workload isn't worth running with load shedding, we should disable it in this variant.