kubevirt: Run afterburn-hostname service

The KubeVirt platform is already supported by afterburn to set the
hostname, also there is an official fedora coreos container disk to run
it. This change include it in the list of platforms allowed to run
afterburn hostname feature at startup.

Signed-off-by: Enrique Llorente <ellorent@redhat.com>

dracut/30afterburn/afterburn-hostname.service

@@ -13,6 +13,7 @@ ConditionKernelCommandLine=|ignition.platform.id=hetzner
 ConditionKernelCommandLine=|ignition.platform.id=ibmcloud
 ConditionKernelCommandLine=|ignition.platform.id=scaleway
 ConditionKernelCommandLine=|ignition.platform.id=vultr
+ConditionKernelCommandLine=|ignition.platform.id=kubevirt
 
 # We order this service after sysroot has been mounted
 # but before ignition-files stage has run, so ignition can