vmm: Add 'host_numa_nodes' option to memory zones

Since memory zones have been introduced, it is now possible for a user
to specify multiple backends for the guest RAM. By adding a new option
'host_numa_node' to the 'memory-zone' parameter, we allow the guest RAM
to be backed by memory that might come from a specific NUMA node on the
host.

The option expects a node identifier, specifying which NUMA node should
be used to allocate the memory associated with a specific memory zone.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -467,6 +467,8 @@ components:
         hugepages:
           type: boolean
           default: false
+        host_numa_node:
+          type: uint64
 
     MemoryConfig:
       required: