fix(virtualization): use hostname variable instead of hardcoded archiso in cloud-user-data

roles/virtualization/templates/cloud-user-data.yml.j2

@@ -1,5 +1,5 @@
 #cloud-config
-hostname: "archiso"
+hostname: "{{ hostname }}"
 ssh_pwauth: true
 package_update: false
 package_upgrade: false