test: allow ENFILE in test-worker-init-failure

Refs: https://github.com/nodejs/node/pull/34727#issuecomment-672862034

PR-URL: https://github.com/nodejs/node/pull/34769


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ricky Zhou <0x19951125@gmail.com>