tools: specify rules disabled in common/dns.js

Instead of disabling all ESLint rules for a line, specify the two rules
that should be disabled.

PR-URL: https://github.com/nodejs/node/pull/22563


Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>