test: fix flaky test-benchmark-util

Allow for zero iterations on benchmarks with a short duration.

PR-URL: #17473
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Khaidi Chu <i@2333.moe>

Author: Trott

test/parallel/test-benchmark-util.js

@@ -11,4 +11,5 @@ runBenchmark('util',
               'n=1',
               'option=none',
               'type=',
-              'version=native']);
+              'version=native'],
+             { NODEJS_BENCHMARK_ZERO_ALLOWED: 1 });