test: separate WPT console test from other test

Remove one test from test-whatwg-console-is-a-namespace that is not part
of the WPT test. Put it in test-console-self-assign.

PR-URL: https://github.com/nodejs/node/pull/23340


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>