verify zoned workers work in dev/publish

[petebacondarwin]

Steps to check:

• Create a project with routes in wrangler.toml
• Check wrangler publish
  • if you specify a route at the command line (via --route) it overrides anything in the wrangler.toml (rather than the union of routes)
  • the workers_dev setting defaults to true, so the xxx.workers.dev route is always, also, deployed
  • workers_dev = false appears to have no effect when it comes to publishing
  • if you specify a route (viawrangler.toml or --route) that has not been configured for DNS, then it will still "deploy" but of course the URL will not work. We should look into updating the DNS automatically as part of the deployment.
• Check wrangler dev
  • Dev mode works as expected - it published to a preview worker and any zoned route is effectively ignored, AFAICT.
• Check durable_objects support for dev and publish #563
• Deprecate zone_id config - it should just come from routes
  • To be done as part of the config validation work (config validation (warnings, errors, deprecations, etc) #291)
• Automatically setup a subdomain if it doesn't exist #511
  • or to give guidance on how to do this

[petebacondarwin]

The counterpart to this issue is #318

[petebacondarwin]

Unassigning myself as I have captured most of the outstanding concerns in other issues.