kubevirt: Enable live-migration by default (#652)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Expanded configuration options now include the ability to enable live
migration for virtual machine management, offering smoother transitions
and enhanced flexibility.
- Introduced a new eviction strategy for managing virtual machine
evictions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Andrei Kvapil <kvapss@gmail.com>

packages/system/kubevirt/templates/kubevirt-cr.yaml

@@ -11,6 +11,8 @@ spec:
       featureGates:
       - HotplugVolumes
       - ExpandDisks
+      - LiveMigration
+    evictionStrategy: LiveMigrate
   customizeComponents: {}
   imagePullPolicy: IfNotPresent
   monitorNamespace: tenant-root