nixos/proxmox-image: don't assume virtio0 is using local-lvm storage

    cfgLine = name: value: ''

      ${name}: ${builtins.toString value}

    '';

    virtio0Storage = builtins.head (builtins.split ":" cfg.qemuConf.virtio0);

    cfgFile = fileName: properties: pkgs.writeTextDir fileName ''

      # generated by NixOS

      ${lib.concatStrings (lib.mapAttrsToList cfgLine properties)}

      #qmdump#map:virtio0:drive-virtio0:local-lvm:raw:

      #qmdump#map:virtio0:drive-virtio0:${virtio0Storage}:raw:

    '';

    inherit (cfg) partitionTableType;

    supportEfi = partitionTableType == "efi" || partitionTableType == "hybrid";