lib: make sure `console` is writable

The code currently assumes that `console` is already writable, but
that's only if it was previously defined as writable. If it hasn't
already been defined then the default value is false.

Refs: https://github.com/nodejs/node/pull/17708

PR-URL: https://github.com/nodejs/node/pull/20185


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>