containerd: add hashes for 1.5.8 and 1.4.12 and make 1.5.8 the new default (#8239)

* containerd: add hashes for 1.5.8 and 1.4.12 and make 1.5.8 the new default

* containerd: make nerdctl mandatory for container_manager = containerd

* nerdctl: bump to version 0.14.0

* containerd: use nerdctl for image manipulation

* OpenSuSE: install basic nerdctl dependencies