test: deflake test-http2-options-max-headers-block-length

The socket can be closed while data is still being written, causing an
`ECONNRESET` error to be emitted on the client. Add a listener for it.

PR-URL: #57959
Reviewed-By: LiviaMedeiros <livia@cirno.name>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

Author: lpinca

test/parallel/test-http2-options-max-headers-block-length.js

@@ -22,6 +22,8 @@ server.listen(0, common.mustCall(() => {
   const client = h2.connect(`http://localhost:${server.address().port}`,
                             options);
 
+  client.on('error', () => {});
+
   const req = client.request();
   req.on('response', common.mustNotCall());