fix(cleanup): fix cleanup for Buildah images by switching to tag-based logic #6437
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The cleanup process for images built using Buildah was not working as expected due to an issue with digest-based parent lookup, as outlined in Buildah #3866. This issue occurs because Buildah currently does not provide a reliable way to retrieve the digest of an image without publishing it to a registry.
To address this, the cleanup logic has been updated to use image tags instead of digests as the unique identifier for the images. This change ensures that the cleanup process works as expected, even for images built with Buildah.
fix #6373