[Bug] Python 3.13.3 on macOS Intel hangs post-test

[cretz]

Describe the bug

On latest Python (3.13.3 as of this writing), macOS Intel sometimes hangs post pytest run in our CI, with things like:

 2025-04-17T16:21:46.354310Z  WARN temporal_client::retry: gRPC call poll_nexus_task_queue retried 6 times error=Status { code: Unavailable, message: "tcp connect error: Connection refused (os error 61)", source: Some(tonic::transport::Error(Transport, ConnectError(ConnectError("tcp connect error", Os { code: 61, kind: ConnectionRefused, message: "Connection refused" })))) }
2025-04-17T16:21:46.373735Z  WARN temporal_client::retry: gRPC call poll_workflow_task_queue retried 6 times error=Status { code: Unavailable, message: "tcp connect error: Connection refused (os error 61)", source: Some(tonic::transport::Error(Transport, ConnectError(ConnectError("tcp connect error", Os { code: 61, kind: ConnectionRefused, message: "Connection refused" })))) }

and

2025-04-17T22:02:54.232127Z  WARN temporal_client::retry: gRPC call get_workflow_execution_history retried 5 times error=Status { code: Unavailable, message: "tcp connect error: Connection refused (os error 61)", source: Some(tonic::transport::Error(Transport, ConnectError(ConnectError("tcp connect error", Os { code: 61, kind: ConnectionRefused, message: "Connection refused" })))) }
2025-04-17T22:02:55.213783Z  WARN temporal_client::retry: gRPC call get_workflow_execution_history retried 6 times error=Status { code: Unavailable, message: "tcp connect error: Connection refused (os error 61)", source: Some(tonic::transport::Error(Transport, ConnectError(ConnectError("tcp connect error", Os { code: 61, kind: ConnectionRefused, message: "Connection refused" })))) }

This may be some worker in some test unable to shutdown properly in this specific situation.