• depends on / stacked on use consistent alias for docker image spec #51099
• depends on / stacked on daemon: stop propagating Image.DockerVersion, Plugin.Config.DockerVersion fields #51101
• depends on / stacked on daemon/server: move GetImageOpts, ImageInspectOpts to imagebackend #51102
• depends on / stacked on api/types/image: InspectResponse: deprecate Parent, DockerVersion #51104

relates to:

• Content addressability #17924
• API: deprecate VirtualSize field for /images/json and /images/{id}/json #45346
• API: omit deprecated VirtualSize field for API v1.44 and up #45469
• api: Deprecate Container and ContainerConfig for /images/{id}/json #46939
• api/image-inspect: Remove Container and ContainerConfig #47430
• api/types/plugin: deprecate Config.DockerVersion field #51109

api/types/image: InspectResponse: remove deprecated fields

The InspectResponse type contains various fields that are deprecated
and removed from current API versions, but that were kept for the API
server to produce the fields when downgrading to older API versions.

This patch:

• Introduces a imagebackend.InspectData type for the daemon to use for
  returning the data needed to propagate the API response. It currently
  embeds the API response type and combines it with the legacy fields,
  but this could be changed to return the internal Image type, and
  mapping the fields to the API response type in the router.
• Removes the deprecated fields from the InspectResposne struct; this
  means that client.ImageInspect won't unmarshal those fields, but
  the docker image inspect CLI command defaults to printing the raw
  output as returned by the API, so can continue to show any field returned
  in the API response. As a side-note; we should change the CLI to default
  to show the unmarshalled response, and introduce a --format=jsonraw
  (or --raw) option to make printing the raw response opt-in.

This patch removes the following fields from the InspectResponse type;

• VirtualSize: this field became obsolete with the migration to content-
  addressable images in docker v1.10 (moby@4352da7), but was still returned
  with a copy of the Size field. It was deprecated in API v1.43 (moby@1261fe6),
  and removed in API v1.44 (moby@913b0f5).
• Container and ContainerConfig: both fields were deprecated in
  API v1.44 (moby@1602e2f), and removed in API v1.45 (moby@03cddc6).

remove deprecated Container, ContainerConfig, VirtualSize

api/types/image: InspectResponse: remove deprecated Parent, DockerVersion

The InspectResponse type contains various fields that are deprecated
and removed from current API versions, but that were kept for the API
server to produce the fields when downgrading to older API versions.

• The Parent field is only used for the legacy builder, and only set for
  images that are built locally (i.e., not persisted when pulling an image).
• The DockerVersion field is only set when building images with the legacy
  builder, and empty in most cases.

Both fields were implicitly deprecated with the deprecation of the legacy
builder, and deprecated for the API in moby@bd8a99b, which was backported
to the 28.x release.

This patch:

• Removes the deprecated fields from the InspectResposne struct; this
  means that client.ImageInspect won't unmarshal those fields, but
  the docker image inspect CLI command defaults to printing the raw
  output as returned by the API, so can continue to show any field returned
  in the API response. As a side-note; we should change the CLI to default
  to show the unmarshalled response, and introduce a --format=jsonraw
  (or --raw) option to make printing the raw response opt-in.
• Updates the API server to backfill the fields if they are set.

- Human readable description for the release notes

Go SDK: api/types/image: `InspectResponse`: remove deprecated `VirtualSize`, `Container`, `ContainerConfig`, `Parent`, and `DockerVersion` fields.

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