Feature: Allow run_worker_first to include the hostname/origin.

[jamestalmage]

Describe the solution

It would be nice if the run_worker_first allowed all the URL matching patterns available in _headers and _redirects... Specifically the ability to match on hostname, etc. One use case would be requiring auth for static assets on preview branches, without having to reconfigure when elevating a preview deployment to production:

{
   run_worker_first: ['https://:version.:subdomain.workers.dev/*']
}