VMExtensionProvisioningError with build-azure-sig-ubuntu-2204-cvm

[aep]

trying to go through https://capz.sigs.k8s.io/self-managed/confidential-vms

however maybe the image created by build-azure-sig-ubuntu-2204-cvm is no longer compatible?

{
  "startTime": "2025-01-14T09:42:59.6552474+00:00",
  "endTime": "2025-01-14T09:48:05.6547841+00:00",
  "status": "Failed",
  "error": {
    "code": "VMExtensionProvisioningError",
    "message": "VM has reported a failure when processing extension 'CAPZ.Linux.Bootstrapping' (publisher 'Microsoft.Azure.ContainerUpstream' and type 'CAPZ.Linux.Bootstrapping'). Error message: 'Enable failed: failed to execute command: command terminated with exit status=1\n[stdout]\n\n[stderr]\n'. More information on troubleshooting is available at https://aka.ms/vmextensionlinuxtroubleshoot. "
  },
  "name": "1561d35a-9499-4ddb-8873-d72d491b1e55"
}