fix(80setup-root): Handle initrd OEMs
fix(80setup-root): Handle initrd OEMs

Replaces the copy currently handled by the squashfs module.

coreos/bootengine,coreos/ignition,mischief/bootengine,mjg59/bootengine,coreos/ignition,yuwata/bootengine,andrejro/coreos--bootengine,coreos/ignition,crawford/bootengine