feat(vmsnapshot, vdsnapshot): add d8v prefix to snapshot supplemental resources

[loktev-d]

Description

Implements d8v prefixing for VirtualMachineSnapshot and VirtualDiskSnapshot service resources according to the ADR for consistent naming across the virtualization module.

Key changes:

• VMS Secret: Changed from <name> to d8v-vms-<name>-<uid> format
• VDS VolumeSnapshot: Changed from <name> to d8v-vds-<name>-<uid> format
• Added CommonSupplement() method to supplements.Generator
• Resources are now fetched using status fields (.Status.VirtualMachineSnapshotSecretName and .Status.VolumeSnapshotName)

Why do we need it, and what problem does it solve?

What is the expected result?

Checklist

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

Changelog entries

section: vmsnapshot
type: feature
summary: add d8v prefix to snapshot supplemental resources

[deckhouse-BOaTswain]

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