Tests for forbidden host code-points and resolution of non-special URLs

[alwinb]

This adds additional tests for:

1. The forbidden host codepoints.
2. Resolution of non-special URLs,
   e.g. abc:rootless against abc://host/path should result in abc:rootless.

Related issues:

• Forbid < and > in hosts whatwg/url#458
• Forbid | in URL hosts whatwg/url#589
• Non-special relative handling differs from whatwg-url alwinb/spec-url#6

/cc @TimothyGu

Edit It seems some of the forbidden host code points were already tested in #23572.
Let me know if I should remove the (few) duplicates.

[TimothyGu]

Would it be possible to add these tests near the tests added in #23572?

Also, the prevailing style in the file is to have { not be on the same line as the first property.

[TimothyGu]

"strict resolution" isn't a term used in the URL Standard, though I know it is in RFC 3986. Let's just say

Suggested change

	"Ensure that non-special URLs use strict resolution",
	"Ensure that schemes are not dropped when resolving non-special URLs",

[domenic]

Normative content of tests LGTM, but it'd be great to address the style/naming issues pointed out by @TimothyGu.

[alwinb]

I understand and agree, no need to point it out twice.

I moved the entire block of forbidden host codepoint tests up and removed the three duplicates.
I went with a just slightly different wording for the comment, I think it is a bit more clear.
I changed the formatting and also found one other line starting with { ". Of my hand I am afraid, apologies. I changed that one as well.