🚀 Feature Request: Deleting a worker using `custom_domain`, does not delete the edge certificate generated for it

[CMCDragonkai]

Describe the solution

I noticed that when we use custom_domain = true, a new edge certificate is created for that custom domain. Deleting the worker does not delete that advanced certificate. We are using this for review apps, and so we have lots of custom domains, and this leads to lots of certificates being built up.