test: reduce test-benchmark-http iterations

Supply `type=asc` option in test-benchmark-http to reduce runs in all
benchmark files to one combination of options.

PR-URL: https://github.com/nodejs/node/pull/16137
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/sequential/test-benchmark-http.js

@@ -22,6 +22,7 @@ runBenchmark('http',
                'len=1',
                'method=write',
                'n=1',
-               'res=normal'
+               'res=normal',
+               'type=asc'
              ],
              { NODEJS_BENCHMARK_ZERO_ALLOWED: 1 });