feat: multiple hostname routing

[ddevsr]

Description
Supersedes #9031

Example

$routes->group('api', ['hostname' =>  ['api.website.com', 'api.website.net]], function ($routes) {
    $routes->get('/', 'Api::royplayer');
});

Thanks to @mrjk990

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[kenjis]

LGTM! Thank you.