[url] Add tests for trailing spaces on setters

[lucacasonato]

Adding some tests around trailing spaces and C0 control characters for pathname,
search, and hash setters, because some implementations incorrectly strip them.

Simplified test case:

const url = new URL('http://example.com/');
url.pathname = '/ ';
url.search = '? ';
url.hash = '# ';
console.log(url.href);

Implementations:

// whatwg-url@13.0.0
"http://example.com/%20?%20#%20" ✅

// Chrome 117.0.5881.0
"http://example.com/%20?%20#%20" ✅

// Firefox 114.0.2
"http://example.com/%20?%20#%20" ✅

// Safari TP 171
"http://example.com/?#%20" ❌

// Deno 1.35.0
"http://example.com/?%20#%20" ❌

// node@20.4.0
"http://example.com/%20?%20#%20" ✅

[lucacasonato]

Safari bug: https://bugs.webkit.org/show_bug.cgi?id=259080

Deno bug: servo/rust-url#847