test: mark async-hooks/test-callback-error as flaky

Refs: #15985

PR-URL: #22330
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

test/async-hooks/async-hooks.status

@@ -13,6 +13,8 @@ test-statwatcher: PASS,FLAKY
 [$system==linux]
 # https://github.com/nodejs/node/issues/21425
 test-statwatcher: PASS,FLAKY
+# https://github.com/nodejs/node/issues/15985
+test-callback-error: PASS,FLAKY
 
 [$system==macos]