Image promotion for etcd 3.5.16-0

[bzsuni]

~# nerdctl inspect  gcr.io/k8s-staging-etcd/etcd:3.5.16-0
[
    {
        "Id": "sha256:a9e7e6b294baf1695fccb862d956c5d3ad8510e1e4ca1535f35dc09f247abbfc",
        "RepoTags": [
            "gcr.io/k8s-staging-etcd/etcd:3.5.16-0"
        ],
        "RepoDigests": [
            "gcr.io/k8s-staging-etcd/etcd@sha256:c6a9d11cc5c04b114ccdef39a9265eeef818e3d02f5359be035ae784097fdec5"
        ],

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: bzsuni
Once this PR has been reviewed and has the lgtm label, please assign cpanato for approval. For more information see the Kubernetes Code Review Process.

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