test: more comprehensive IDNA test cases

- Split the tests out to a separate file
- Add invalid cases
- Add tests for url.domainTo*()
- Re-enable previously broken WPT URL parsing tests

PR-URL: https://github.com/nodejs/node/pull/11549


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>