Set image metadata on raw arcus images

Author: m-bull

.github/extra_vars/arcus.yml

@@ -23,6 +23,10 @@ image_build_image_disk_format: "raw"
 image_build_volume_size: 10
 image_build_metadata:
   hw_vif_multiqueue_enabled: "yes"
+  hw_scsi_model: "virtio-scsi"
+  hw_disk_bus: "scsi"
+  hw_qemu_guest_agent: "yes"
+  os_require_quiesce: "yes"
 image_build_flavor_name: "vm.ska.cpu.general.small"
 image_build_network_id: "4b6b2722-ee5b-40ec-8e52-a6610e14cc51"
 image_build_attach_floating_ip: true