Add OCI artifact support, test syncing Cosign signatures again#1680

vrothberg merged 2 commits intocontainers:maincontainers/skopeo:mainfrom

mtrmac:test-registry-2.8.1-with-cosign-signaturesmtrmac/skopeo:test-registry-2.8.1-with-cosign-signaturesCopy head branch name to clipboard