containerd integration: implement "prune" (--no-prune) option for image delete

[thaJeztah]

Description

• relates to containerd integration: Implement ImageDelete for containerd #43820

The containerd implementation does not yet implement the prune option

Existing implementation can be found in

moby/daemon/images/image_delete.go

Line 295 in 7624f8a

func (i *ImageService) imageDeleteHelper(imgID image.ID, records *[]types.ImageDeleteResponseItem, force, prune, quiet bool) error {

We should look if this option still makes sense, or if we should deprecate it; it looks now to (mostly) the classic builder, which has a concept of "parent" images (before docker 1.10, all images had "parent" images, but that's no longer the case).

[laurazard]

Closing/moving to done since this was fixed by #45427