tools: auto fix custom eslint rule

1. Extends tests
2. Refactors code
3. Adds fixer

Refs: #16636

PR-URL: https://github.com/nodejs/node/pull/16652
Refs: https://github.com/nodejs/node/issues/16636


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>