Build the image for TestIssue13030 locally using pkg/archive,
instead of pulling the prebuilt ghcr.io/containerd/whiteout-test image.
The image is built by appending layers generated with archive.WriteDiff
on top of the busybox base image, served with the new
testutil.ServeImage helper on a localhost HTTP registry, and pulled
through the regular client.Pull path with WithPullUnpack. This removes
the need to publish the multi-arch whiteout-test image, so the
Dockerfile and Makefile added in PR 13704 are removed along with the
image list entry.
Assisted-by: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
