Improve gitaly info refs error message
https://sentry.gitlap.com/gitlab/gitlab-workhorse-gitlabcom/issues/23388/
handleGetInfoRefs: handleGetInfoRefsWithGitaly: Error receiving response from server: write unix /var/opt/gitlab/gitlab-workhorse/socket->@: write: broken pipe
The "Error receiving response from server" bit is inaccurate.