Support OCI image-spec v1.1.0

[FeynmanZhou]

What is the version of your ORAS CLI

v1.2.0-beta.1

What would you like to be added?

OCI group announced the Image-spec v1.1.0 and Distribution-spec v1.1.0 in Feb 2024.

What changes we should make in ORAS:

• Bump up the dep github.com/opencontainers/image-spec v1.1.0-rc6 to github.com/opencontainers/image-spec v1.1.0 build(deps): bump github.com/opencontainers/image-spec from 1.1.0-rc6 to 1.1.0 #1272
• Bump up the dep oras.land/oras-go/v2 v2.4.0 to oras.land/oras-go/v2 v2.5.0, in order to be compliant with OCI Distribution-spec v1.1.0, see Upgrade to distribution-spec v1.1.0 oras-go#709
• Change the "Experimental" label to "Preview" in the flag --image-spec of oras push. See Compatibility mode for ORAS for original design context
• Keep the "Preview" label from the flag --distribution-spec in oras attach, oras cp, oras manifest push, and oras discover for the context feat: make image spec preview #1338
• Archive the repo artifact-spec: Preparing to archive the artifacts repo artifacts-spec#122

Why is this needed for ORAS?

It will make ORAS be compliant with the latest OCI Spec v1.1.0 and increase the feature maturity

Are you willing to submit PRs to contribute to this feature?

• Yes, I am willing to implement it.

[qweeah]

Suggest to elevate --image-spec to preview and make --distribution-spec stay on preview.

[FeynmanZhou]

Suggest to elevate --image-spec to preview and make --distribution-spec stay on preview.

That sounds reasonable as some registries like GHCR, Docker Hub, ECR are still compliant with OCI v1.0. It would be good to remove "preview" labels from --image-spec and --distribution-spec untill most of the popular registries upgrade to OCI v1.1

[FeynmanZhou]

Completed as all related sub-issues are closed.