Adopt stargz: Improve image pull performance for tools and servers/containers

[hugosantos]

The traditional Docker format requires a full unpack before a container can start. This adds substantial latency to a edit-refresh cycle.

One approach has seen some adoption: a new format estargz which includes a file index and support random seeking within the archive, as well as updating of container engines to support lazy loading resources from those images.

References

• https://github.com/google/crfs
• https://github.com/containerd/stargz-snapshotter
• https://medium.com/nttlabs/lazy-pulling-estargz-ef35812d73de
• Add eStargz specification to OCI v1 (support lazy pulling) opencontainers/image-spec#815