test: mark test-worker-prof as flaky on smartos

PR-URL: https://github.com/nodejs/node/pull/56583
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/sequential/sequential.status

@@ -32,6 +32,7 @@ test-single-executable-application-empty: PASS, FLAKY
 test-http-server-request-timeouts-mixed: PASS, FLAKY
 
 [$system==solaris] # Also applies to SmartOS
+test-worker-prof: PASS, FLAKY
 
 [$system==freebsd]