Convert rt.vm_test to new compiler API.
Convert rt.vm_test to new compiler API.

Not exactly sure why this wasn't running in the internal CI.

iree-org/iree,google/iree,iree-org/iree,google/iree,iree-org/iree,iree-org/iree,iree-org/iree,iree-org/iree,iree-org/iree,google/iree,google/iree,google/iree,google/iree,google/iree