Attended sysupgrade 23.05.4 pushes the DOS formatted partition instead of GPT

[usr97629238]

Prior to 23.05.4 used to always work just fine, however the last update ignores the fact that the system has a GPT formatted disk and rewrites that as a DOS, making the system unbootable:

Before:

Disk /dev/sda: 128 MiB, 134217728 bytes, 262144 sectors
Disk model: Virtual Disk
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: AB625232-A864-82A1-6538-653008743400

Device      Start    End Sectors  Size Type
/dev/sda1     512  33279   32768   16M Linux filesystem
/dev/sda2   33280 246271  212992  104M Linux filesystem
/dev/sda128    34    511     478  239K BIOS boot

After:

Disk /dev/sdb: 128 MiB, 134217728 bytes, 262144 sectors
Disk model: Virtual Disk
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x92a98644

Device     Boot Start    End Sectors  Size Id Type
/dev/sdb1  *      512  33279   32768   16M 83 Linux
/dev/sdb2       33792 246783  212992  104M 83 Linux