vmm: openapi: Fix integer schema formats

The current OpenAPI schema format is wrong because uint16 and uint32 are
not valid top-level OpenAPI types. Describe queue_size and virtio_id as
integer types with explicit uint formats instead.

Signed-off-by: Roman <roman@vanesyan.com>

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

@@ -1161,7 +1161,8 @@ components:
         queue_size:
           type: array
           items:
-            type: uint16
+            type: integer
+            format: uint16
         pci_segment:
           type: integer
           format: int16
@@ -1169,7 +1170,8 @@ components:
           type: integer
           format: uint8
         virtio_id:
-          type: uint32
+          type: integer
+          format: uint32
 
     PmemConfig:
       required: