Manifest Push with Bazel not Available on s390x

[Davo911]

Is your feature request related to a problem? Please describe:
Currently make push uses bazel to push the manifests to quay.
Bazel is not available for s390x and I think also not the only option.

Describe the solution you'd like:
Looking at how kubevirt is pushing it images it should be possible to push them using podman or docker instead.

Describe alternatives you've considered:
Alternative would be to just skip manifest pushing on s390x

[aglitke]

It seems like a reasonable approach to adopt kubevirt's push method in CDI as well.

[zhlhahaha]

Hi @Davo911 , are you writing PR for pushing manifest via docker/podman command?

[Davo911]

After my vacation this week I will, @zhlhahaha