WIP: containerd integration: Multi-platform images UX

[vvoland]

Description

A draft tracking issue for containerd multiplatform image UX PRs

Combined Moby branch: https://github.com/vvoland/moby/tree/c8d-multiplatform
Combined CLI branch: https://github.com/vvoland/cli/tree/c8d-multiplatform

docker images --tree

Make docker images output multi-platform aware

• Expose platform-specific subimages informations in the API endpoint - c8d: Multi-platform image list #47526
• PoC on the CLI side - image/list: Add --tree flag docker/cli#4982
• Implement as cli/command/formatter

docker inspect --platform=...

• Expose platform-specific subimages informations in the API endpoint
• Add CLI switch

docker convert

Create new docker images from the existing multi-platform images and filter their manifests.
In future this could also support other operations (like converting layer compression, etc).

NOTE: While docker image create could be a better name for this, docker create is already an alias to docker container create.

• CLI implementation - image: Add convert command docker/cli#4983
• Server implementation - c8d: Add ImageConvert #47678

docker push --platform=...

Pick a platform-specific manifest and push it instead of the whole multi-platform index.

• Add CLI switch - cli/push: Add platform switch  docker/cli#4984
• Server implementation - c8d/push: Support --platform switch #47679

docker rmi --platform=...

Remove content of the specified platform

• Add CLI switch
• Server implementation

docker save --platform=...

Pick a platform-specific manifest and save it instead of the whole multi-platform index.

• Add CLI switch
• Server implementation

docker load --platform=...

Load the image from the tarball (multi-platform index), but only import specified platform blobs.

• Add CLI switch
• Server implementation

docker history --platform=...

Show history for the specified platform, otherwise will show the host platform, if host platform isn't available, it will pick any.

• Add CLI switch
• Server implementation