Description of problem:
If I try to install F42 Workstation to a second drive that has MBR, bootloader setup crashes.


Version-Release number of selected component (if applicable):
anaconda-42.27.12-1.fc42.x86_64
anaconda-webui-33-1.fc42.noarch
cockpit-storaged-336.2-1.fc42.noarch


How reproducible:
tried once so far, but I expect always

Steps to Reproduce:
1. prepare two empty disks with a MBR part table created
2. in anaconda select both disks for installation
3. in storage editor, add /boot (ext4) and / (ext4) to the second drive. Keep the first drive untouched.
4. start the installation, it crashes during bootloader setup