Upstream support removed in March 2021
(https://github.com/dracutdevs/dracut/commit/43df4ee2) and deprecation
announcement on factory mailing list in May 2021
(https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/thread/GDAZ7TVXS2BAXENVBAMHVXVHLSR7D7NQ/).

ALP will not ship the mkinitrd wrapper, so it's better to get rid of it in
Tumbleweed first.

Affected packages that need to be updated before (at least):

# zypper se --requires mkinitrd 
Loading repository data...
Reading installed packages...

S  | Name                | Summary                                            |
Type
---+---------------------+----------------------------------------------------+--------
   | kernel-debug        | A Debug Version of the Kernel                      |
package
i+ | kernel-default      | The Standard Kernel                                |
package
   | kernel-default-base | The Standard Kernel - base modules                 |
package
   | kernel-kvmsmall     | The Small Developer Kernel for KVM                 |
package
   | kernel-pae          | Kernel with PAE Support                            |
package
   | kernel-vanilla      | The Standard Kernel - without any SUSE patches     |
package
i  | mdadm               | Utility for configuring "MD" software RAID devices |
package