Fix for alternatives support

https://github.com/fedora-sysv/chkconfig/pull/135 has been merged and might help us with alternatives on Atomic Desktops.

This needs investigation to figure out how this works for new systems and how to migrate existing systems if needed.

See:

• https://github.com/fedora-sysv/chkconfig/issues/9
• https://github.com/coreos/fedora-coreos-tracker/issues/677
• https://github.com/coreos/rpm-ostree/issues/1614
• https://github.com/fedora-silverblue/issue-tracker/issues/430
• fedora/bootc/tracker#7 (closed)