nerdctl images displays the wrong image id

### Description

Whenever nerdctl displays lists of images (nerdctl images, nerdctl image list), the ID being reported are the repo sha, not the image ID.

Compare with Docker.

### Steps to reproduce the issue

1. nerdctl images
2. docker images

### Describe the results you received and expected

Expected: Docker behavior - see the image ID.

Received: repo digest

### What version of nerdctl are you using?

1.7.6

### Are you using a variant of nerdctl? (e.g., Rancher Desktop)

None

### Host information

_No response_