[v8.x backport] test: bypass dns for IPv6 net tests
PR-URL: https://github.com/nodejs/node/pull/16976 Refs: https://github.com/nodejs/node/pull/16248 Reviewed-By: Joyee Cheung joyeec9h3@gmail.com
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Backport, as requested, of https://github.com/nodejs/node/pull/16976