Remove the repoReference parameter of imagesToCopyFromRepo
Remove the repoReference parameter of imagesToCopyFromRepo

It is redundant, only used to form a tagged reference,
which can be done more safely using reference.WithTag.

Also move the *types.SystemContext parameter to the front,
as is usual.

Should not change behavior, apart from a few error messages.

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

mtrmac/skopeo,mtrmac/skopeo,mtrmac/skopeo