test: replace Google servers with localhost

Replace Google DNS servers with 127.0.0.1 in
test-dns-setserver-when-querying.

Refs: https://github.com/nodejs/node/issues/25664

PR-URL: https://github.com/nodejs/node/pull/25694


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>