test: discard data received by client

This test was timing out after update to OpenSSL-1.1.1e.

PR-URL: https://github.com/nodejs/node/pull/32328
Fixes: https://github.com/nodejs/node/issues/32210


Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>