Unable to do bootc image copy-to-storage

[ckyrouac]

This commit appears to be the culprit. Using the commit prior, copy-to-storage works. Afaict the introduction of deploy::pull to the install path caused this problem. This breaks the existing tmt tests.

Reproduction steps:

• git checkout 8b30128
• podman build -t localhost/bootc -f hack/Containerfile .
• podman-bootc run localhost/bootc
• bootc image copy-to-storage
• error:

[root@localhost ~]# bootc image copy-to-storage
Copying local image docker://localhost/bootc:latest to containers-storage:localhost/bootc ...
ERROR Pushing image: Export: Copying image: No such image

Some initial debugging by @cgwalters showed the pulled image has the sha digest attached.

[cgwalters]

This was fixed by #726