Allow podman for normal build steps
Allow podman for normal build steps

If docker is present and working, continue choosing docker. If it is not
present try to fallback to podman. In case that KUBEVIRT_CRI
environment variable is set, try to use whatever is selected there.

Signed-off-by: rmohr <6da0130c5aeef94e5bbaabadbf8017270be25c64@redhat.com>

stu-gott/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt