Migrate BulkCloneCloudInit from temp global functions to conversion utility

[coelacant1]

Description

VirtualMachines/Operations/BulkCloneCloudInit.sh currently uses temporary global functions instead of the shared conversion utility. This leads to code duplication and inconsistency with other scripts that have been migrated to use the centralized utility functions.

The script should be refactored to import and use the conversion utility (likely from Resources/ or Utilities/) instead of defining its own temporary global functions.

Acceptance Criteria

• Temporary global functions removed from BulkCloneCloudInit.sh
• Script uses the shared conversion utility via proper source include
• All existing functionality preserved (clone + cloud-init configuration)
• Script tested to verify no regressions in clone workflow