feat(vmsnapshot): add the ability to snapshot virtualmachines

[Isteb4k]

Description

New resource VirtualMachineSnapshot:

1. CRD using kubebuilder, ru version
2. Controller ensuring the consistency of the virtual machine and block devices when creating a snapshot (Freezing, no RestartAwaitingChanges, management via RequiredConsistency)
3. Conditions VirtualMachineReady, VirtualMachineSnapshotReady
4. Management of underlying secret and corresponding virtual disk snapshots.
5. CacheSyncTimeout 10 min for all controllers

Checklist

• [x] The code is covered by unit tests.
• [x] e2e tests passed.
• [x] Documentation updated according to the changes.
• [x] Changes were tested in the Kubernetes cluster manually.