versions: Upgrade to Cloud Hypervisor v19.0

Highlights from the Cloud Hypervisor release v19.0: 1) Improved PTY
handling for serial and virtio-console; 2) PCI boot time optimisations;
3) Improved TDX support; 4) Live migration enhancements (support with
virtio-mem and virtio-balloon); 5) virtio-mem support with vfio-user; 6)
AArch64 for virtio-iommu; 7) Various bug fixes for live-migration and
VFIO passthrough.

Details can be found: https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v19.0

Fixes: #2871

Signed-off-by: Bo Chen <chen.bo@intel.com>
(cherry picked from commit 8296754)

versions.yaml

@@ -75,7 +75,7 @@ assets:
       url: "https://github.com/cloud-hypervisor/cloud-hypervisor"
       uscan-url: >-
         https://github.com/cloud-hypervisor/cloud-hypervisor/tags.*/v?(\d\S+)\.tar\.gz
-      version: "v18.0"
+      version: "v19.0"
 
     firecracker:
       description: "Firecracker micro-VMM"