lib: use focused ESLint disabling in util.js

Instead of disabling all ESLint rules for two lines that require a
violation of no-control-regex, disable only the no-control-regex rule.

PR-URL: https://github.com/nodejs/node/pull/21041


Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>