Cello/Argo Workflow log stream goroutine leak

[pclata]

There is a known goroutine leak in the Argo Workflow log streaming method when the cello logs -f CLI command is terminated in the middle of streaming a log. The logs will continue to stream on the server side. Not a major impact as there are no errors occurring when the CLI is terminated, but still warrants a look to avoid any unnecessary processing or tough issues to solve because of leaks.