Fixes #8069 The image age from the CRI is the moment the image was pulled, so if it was pulled long time ago, the previous version would nuke the image as soon as it is unreferenced. The new version would allow the image to stay for the full grace period in case the rollback is requested. Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>