Environments support for multiworker service registry

[GregBrimble]

trafficstars

What version of Wrangler are you using?

2.0.25

What operating system are you using?

macOS

Describe the Bug

Right now, it's tricky to use environments with the multiworker service registry stuff. Right now, all services register themselves under just their name (which, in the old school environments way is ${name}-${environment}. This makes binding to them hard because you need to compose this manually.

Additionally, we should probably figure out a way to support running multiple environments of a single service.