dotnet dev-certs https doesn't support sub domains

### Is your feature request related to a problem? Please describe.
I work on multiple projects that have to have unique dev urls.

i.e. api.{projectname}.dev.localhost

So that the urls and ports are all differentiated.

The current setup for trust on dev.localhost is only a wildcard on *.dev.localhost.

### Describe the solution you'd like
I'd like the ability to create a dev certificate and specify the sub dev.localhost domain so that I can do *.{projectname}.dev.localhost

### Additional context
I think any developer that has to work on multiple projects on the same machine would appreciate this. It often allows consistency between production environments as well doing this.