To enable automatic update of WPT, move all our custom
WHATWG URL tests that are not present in the upstream into
files starting with `test-whatwg-url-custom-`, so it's easier
to identify test cases that can be upstreamed and test cases
that should be rolled into our repo (possibly with automation).
PR-URL: https://github.com/nodejs/node/pull/22442
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
