Proposal: Use referrers api to import/export inline type cache

[njucjc]

The inline cache exporter only supports min cache mode, to expand inline cache exporter to max mode, I recommend using the referrers api to associate the original image with the build cache.

referrers api: https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-manifests-with-subject