test: skip test-benchmark-os.js on IBM i

PR-URL: #50208
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>

Author: abmusse

test/benchmark/benchmark.status

@@ -19,3 +19,7 @@ prefix benchmark
 [$system==aix]
 
 [$arch==arm]
+
+[$system==ibmi]
+test-benchmark-os.js: SKIP
+