c8d: show the real image creation date when listing images

[rumpl]

- What I did

Used the creation date of the imge from the config and not from the containerd metadata,

$ docker pull busybox
$ docker images      
REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
-busybox      latest    3fbc63216742   20 seconds ago   6.61MB
+busybox      latest    3fbc63216742   3 months ago   6.61MB

Also set the ParentID to whatever we find in the image labels

- How I did it

- How to verify it

- Description for the changelog

- A picture of a cute animal (not mandatory but encouraged)

[thaJeztah]

Micro-nit; as we already have a summary var in which we store the image-data, I guess we can avoid the created var if we put this block after it;

if cfg.Created != nil {
    summary.Created = cfg.Created.Unix()
}

Would there be a need to do && !cfg.Created.IsZero() as well? (not sure)

[rumpl]

I think it's fine to set the Created in the IsZero case, that's actually what the GD case does

[rumpl]

Huhu, want me to change this one too while I'm at it?

moby/daemon/images/image_list.go

Lines 257 to 260 in dcc8020

	if image.Created != nil {
	created = image.Created.Unix()
	}
	summary := &imagetypes.Summary{

[thaJeztah]

Oh! We can; but that's fine for a separate PR, as that's not a new change, right?

My comment was mostly; if we want to; let's do so before merging, to reduce (ever so little) code churn 👍

[thaJeztah]

LGTM