sysregistriesv2: Export registries struct for v1 format
sysregistriesv2: Export registries struct for v1 format

Need the v1 registries structs to be public so that I can
use it in the CRD and controller stuff for container runtime
config in the machine-config-operator repo.

Signed-off-by: Urvashi Mohnani <ed14d56198a00c20f6cfcd6e69dfd4189930e8e4@redhat.com>

containers/image,containers/image