Vendor c/image after https://github.com/containers/image/pull/1816

Also includes unreleased https://github.com/openshift/imagebuilder/pull/246 to work
with the updated docker/docker dependency.

And updates some references to newly deprecated docker/docker symbols.

[NO NEW TESTS NEEDED]

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

vendor/github.com/containers/image/v5/internal/signature/signature.go

@@ -66,17 +66,15 @@ func FromBlob(blob []byte) (Signature, error) {
 		// The newer format: binary 0, format name, newline, data
 	case 0x00:
 		blob = blob[1:]
-		newline := bytes.IndexByte(blob, '\n')
-		if newline == -1 {
+		formatBytes, blobChunk, foundNewline := bytes.Cut(blob, []byte{'\n'})
+		if !foundNewline {
 			return nil, fmt.Errorf("invalid signature format, missing newline")
 		}
-		formatBytes := blob[:newline]
 		for _, b := range formatBytes {
 			if b < 32 || b >= 0x7F {
 				return nil, fmt.Errorf("invalid signature format, non-ASCII byte %#x", b)
 			}
 		}
-		blobChunk := blob[newline+1:]
 		switch {
 		case bytes.Equal(formatBytes, []byte(SimpleSigningFormat)):
 			return SimpleSigningFromBlob(blobChunk), nil
@@ -102,10 +100,3 @@ func UnsupportedFormatError(sig Signature) error {
 		return fmt.Errorf("unsupported, and unrecognized, signature format %q", string(formatID))
 	}
 }
-
-// copyByteSlice returns a guaranteed-fresh copy of a byte slice
-// Use this to make sure the underlying data is not shared and can’t be unexpectedly modified.
-func copyByteSlice(s []byte) []byte {
-	res := []byte{}
-	return append(res, s...)
-}