[whatwg/url] Do not remove newline and tab characters (#419)

The current spec requires to produce a validation error if a newline or tab is encountered, and remove them from the input:

https://github.com/whatwg/url/blob/49060c74d3047602a572f9e88a6a1101f4fd32f3/url.bs#L1472-L1474

This contradicts the behavior observed in Firefox, Chrome and Edge:

```js
const url = new URL("http://www.example.com/")
url.pathname = 'foo\nbar';
url.href
```

- Node and WHATWG URL: `"http://www.example.com/foobar"`
- Firefox, Chrome and Edge: `"http://www.example.com/foo%0Abar"`

```js
const url = new URL("http://www.example.com/")
url.pathname = 'foo\tbar';
url.href
```

- Node and WHATWG URL: `"http://www.example.com/foobar"`
- Firefox, Chrome and Edge: `"http://www.example.com/foo%09bar"`

This issue was originally reported for Node: https://github.com/nodejs/node/issues/23696


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