Update c/image for golang.org/x/exp

> go get github.com/containers/image/v5@main
> go mod tidy && go mod vendor

This updates c/image with a new version of x/exp.
That package has changed API in an incompatible way,
so just bumping x/exp (as in https://github.com/containers/skopeo/pull/2060 )
would break Skopeo builds.

This updates both c/image and x/exp in lockstep (and nothing
needs updating in Skopeo itself for the x/exp breakage).

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

vendor/github.com/vbatts/tar-split/tar/asm/disassemble.go

@@ -135,13 +135,15 @@ func NewInputTarStream(r io.Reader, p storage.Packer, fp storage.FilePutter) (io
 				}
 				isEOF = true
 			}
-			_, err = p.AddEntry(storage.Entry{
-				Type:    storage.SegmentType,
-				Payload: paddingChunk[:n],
-			})
-			if err != nil {
-				pW.CloseWithError(err)
-				return
+			if n != 0 {
+				_, err = p.AddEntry(storage.Entry{
+					Type:    storage.SegmentType,
+					Payload: paddingChunk[:n],
+				})
+				if err != nil {
+					pW.CloseWithError(err)
+					return
+				}
 			}
 			if isEOF {
 				break