test: add util.isDeepStrictEqual edge case tests

Test for deep strict equality when prototype and toStringTag
have been modified in surprising ways.

PR-URL: https://github.com/nodejs/node/pull/25932


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>