runtime: clh: update cloud-hypervisor

Update cloud-hypervisor to commit 2706319.
Fixes a limitation in OpenAPITools/openapi-generator tool,
it's impossible to send go zero types, like false and 0 to
cloud-hypervisor because `omitempty` is added if a field is not
required.
See cloud-hypervisor/cloud-hypervisor#1961 for more information

Signed-off-by: Julio Montes <julio.montes@intel.com>

src/runtime/virtcontainers/pkg/cloud-hypervisor/client/api/openapi.yaml

@@ -1078,6 +1078,10 @@ components:
         id:
           type: string
       required:
+      - cache_size
+      - dax
+      - num_queues
+      - queue_size
       - socket
       - tag
       type: object