ANDROID: gunyah: Sync with latest "gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot"

Align VM lifecycle to Gunyah v13 patches posted to kernel.org.

- Move gh_vm_free and kref functions down.
- Simplify/clean up gh_vm_free
- Defer vmid allocation to when the VM is being started

https://lore.kernel.org/all/20230509204801.2824351-12-quic_eberman@quicinc.com/



Bug: 279506910
Change-Id: I413865c16a730365edc83385bc37394b99517ab1
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>