On CentOS 9:
```
TEST-64-UDEV-STORAGE.sh[522]: + mdadm -v --zero-superblock --force /dev/disk/by-id/scsi-0systemd_foobar_deadbeefmdadmlvm0 ...
TEST-64-UDEV-STORAGE.sh[1014]: mdadm: Unrecognised md component device - /dev/disk/by-id/scsi-0systemd_foobar_deadbeefmdadmlvm4
```
This also adds `udevadm settle` before clearing superblocks for safety.
Follow-up for 5ad6fe9850.