<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added RestoreJob resource and end-to-end restore workflows with Velero
integration, including polling and status tracking.
* Introduced Velero restoreSpec to strategy templates and a
virtual-machine backup strategy template.
* Enhanced backup plans UI with backup class and schedule fields.
* **Bug Fixes**
* Enforced non-empty backupClassName and immutability for BackupJob.
* **Chores**
* Removed BackupJob webhook implementation and its tests.
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