[TensorPipe Agent] Improve Response Error Message on Agent Shutdown (#38818)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38818
Standardizes the error message when a response is attempted after the
agent has shut down.
ghstack-source-id: 104673115
Test Plan: Sandcastle - no functionality change, just error message
Differential Revision: D21670706
fbshipit-source-id: d26fcd7c76758c62d432d9c4e6ef2e3af7cbedff
