lib,url: correct URL's argument to pass idlharness

`url.idl` defines URL's constructor as:

```
constructor(USVString url, optional USVString base);
```

`idlharness.any.js` checks its length as `1`. So we should remove
constructor's second argument and use `arguments[1]` in constructor's
logic.

Refs: https://url.spec.whatwg.org/#idl-index

PR-URL: https://github.com/nodejs/node/pull/39848


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>