talos installer fails on disks wiped with `wipefs`

[Noel Georgi]

Talos installer fails to install on disks wiped with wipefs -a <device>

The Sidero agent successfully wiped the disk and marked as clean

20.503050] [talos] pulling "ghcr.io/talos-systems/installer:v0.13.2"
[   31.201521] [talos] service[containerd](Running): Health check failed: rpc error: code = DeadlineExceeded desc = context deadline exceeded
[   35.241785] [talos] service[containerd](Running): Health check successful
[   37.856732] vcc-sd: disabling

[  229.422871] 2021/11/17 09:58:07 running Talos installer v0.13.2
[  229.543755] Error: expected signature of "EFI PART", got "\x00\x00\x00\x00\x00\x00\x00\x00"
[  229.552239] Usage:
[  229.554339]   installer install [flags]
[  229.558255] 
[  229.559809] Flags:
[  229.561976]   -h, --help   help for install
[  229.566274] 
[  229.567817] Global Flags:
[  229.570706] expected signature of "EFI PART", got "\x00\x00\x00\x00\x00\x00\x00\x00"
[  229.578884]       --arch string                    The target architecture (default "arm64")
[  229.587630]       --board string                   The value of talos.board (default "none")
[  229.596298]       --bootloader                     Install a booloader to the specified disk (default true)
[  229.606252]       --config string                  The value of talos.config
[  229.613431]       --disk string                    The path to the disk to install to
[  229.621426]       --extra-kernel-arg stringArray   Extra argument to pass to the kernel
[  229.629496]       --force                          Indicates that the install should forcefully format the partition
[  229.640046]       --platform string                The value of talos.platform
[  229.647289]       --upgrade                        Indicates that the install is being performed by an upgrade
[  229.657311]       --zero                           Indicates that the install should write zeros to the disk before installing
[  229.668719] 
[  229.743646] [talos] task install (1/1): failed: task "upgrade" failed: exit code 1
[  229.751394] [talos] phase install (4/13): failed
[  229.756169] [talos] install sequence: failed

[Andrey Smirnov]

I think we should check for both PMBR and EFI signature. If any of that is missing, disk is not partitioned. Today we seem to only care that PMBR is there.