Migrate cl make functionality to the worker

[AndrewJGaut]

Migrate cl work functionality from the bundle_manager to the worker.

This is a necessary step in the process to make cl replicate.

[AndrewJGaut]

Also, beef up the cl make testing. Right now, it's not very robust.

[AndrewJGaut]

Targeting getting this finished by next Wednesday.

[percyliang]

I think we're no longer doing cl replicate and instead having people manage their own bundle locations, so closing.

[percyliang]

Independent of replicate, we want to have cl make happen on a worker, but this is not a common case, so deprioritizing.