test: remove timeout in test-https-proxy-request-handshake-failure

The timeout is unnecessary since we are testing for certificate
failure. It can cause flakes on very slow machines where the
request cannot be finished in 1 second.

PR-URL: https://github.com/nodejs/node/pull/59165
Fixes: https://github.com/nodejs/node/issues/59166
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/client-proxy/test-https-proxy-request-handshake-failure.mjs

@@ -33,7 +33,6 @@ const requestUrl = `https://${serverHost}/test`;
 const { code, signal, stderr, stdout } = await runProxiedRequest({
   NODE_USE_ENV_PROXY: 1,
   REQUEST_URL: requestUrl,
-  REQUEST_TIMEOUT: 1000,
   HTTPS_PROXY: `http://localhost:${proxy.address().port}`,
 });