Bug: During the image pull down and unpack the file ownership is not changed if specified

[Jordan9500]

Description of problem

When setting up a pod via Kata CC, and running it w/ Image-RS there is an issue with the transfer of ownership for files if the dockerfile specifically alters it.
For example if the dockerfile is:

FROM ubuntu:22.04

RUN mkdir -p /other
# Create bob user
RUN groupadd -g 1000 bob && useradd -g bob -u 1000 -s /bin/bash bob
RUN chown -v bob:bob /other;
USER bob

ENTRYPOINT [ "/bin/bash", "-c", "ls -al other" ]

Expected output

The resulting log output should be:

total 8
drwxr-xr-x 1 bob  bob  4096 Nov 17 13:33 .
drwxr-xr-x 1 root root 4096 Nov 17 13:52 ..

Actual output

However we end up getting:

total 0
drwxr-xr-x 1 root root 40 Nov 21 15:22 .
drwxr-xr-x 1 root root 80 Nov 21 17:02 ..

As shown the directory is still owned by just root, this should of been transferred to "bob".

Further information

I tested the kata environment across all the different areas as shown below in the table:

	Runc	Kata	Kata CC w/ Image-rs	Kata CC w/ Skopeo	PeerPods (with skopeo)	PeerPods (with image-rs)
Chown Test	✅ Pass	✅ Pass	❌ fail	✅ Pass	✅ Pass	❌ Fail

Could this be related to the unpack method currently being used here: https://github.com/confidential-containers/image-rs/blob/76e6abed950152f000d8f70026d11a86cf95fb0c/src/unpack.rs#L32-L34