AK: Don't store parts of URLs percent decoded

As noted in serval comments doing this goes against the WC3 spec,
and breaks parsing then re-serializing URLs that contain percent
encoded data, that was not encoded using the same character set as
the serializer.

For example, previously if you had a URL like:

https:://foo.com/what%2F%2F (the path is what + '//' percent encoded)

Creating URL("https:://foo.com/what%2F%2F").serialize() would return:

https://foo.com/what//

Which is incorrect and not the same as the URL we passed. This is
because the re-serializing uses the PercentEncodeSet::Path which
does not include '/'.

Only doing the percent encoding in the setters fixes this, which
is required to navigate to Google Street View (which includes a
percent encoded URL in its URL).

Seems to fix #13477 too

Userland/Libraries/LibWeb/URL/URL.h

@@ -62,7 +62,7 @@ public:
 
     WebIDL::ExceptionOr<String> to_json() const;
 
-    void set_query(Badge<URLSearchParams>, String query) { m_url.set_query(query.to_deprecated_string()); }
+    void set_query(Badge<URLSearchParams>, String query) { m_url.set_query(query.to_deprecated_string(), AK::URL::ApplyPercentEncoding::Yes); }
 
 private:
     URL(JS::Realm&, AK::URL, JS::NonnullGCPtr<URLSearchParams> query);