VM info should be available on runner pod, so scheduler doesn't need to watch VMs

[Em Sharnoff]

Problem description / Motivation

There's a lot of complication in the scheduler and our Watch implementation that comes from needing to Relist() to synchronize state (see #851). It'd be nice if we could just look at a single object source, rather than trying to link two of them together.

Feature idea(s) / DoD

Similar to the vm.neon.tech/usage annotation, all of the information extracted and used in api.VmInfo should be available from annotations & labels on the pod, without consulting the VirtualMachine object.

Implementation ideas

Probably can do something similar to vm.neon.tech/usage.