Replace postProgressRegistries([]Registry) with V2RegistryConf.postProcess
Replace postProgressRegistries([]Registry) with V2RegistryConf.postProcess

... to deal with the whole v2 configuration as a single unit.

Does not change behavior.

Signed-off-by: Miloslav Trmač <9c008e38982a5397deb855345fb164f0558459ae@redhat.com>

containers/image,containers/image