Helm chart OCI support

[Syntax3rror404]

Since OCI is now GA since 3.8.0 see https://helm.sh/docs/topics/registries/ please also package the ingress-nginx chart also to a OCI registry, best case with cosign.

Also other SIG projects like https://github.com/kubernetes-sigs/kueue or https://github.com/kubernetes-sigs/jobset now supports helm OCI and published there OCI charts to registry.k8s.io

#11642 closed because of a misunderstanding, that registry.k8s.io don't support OCI.

[k8s-ci-robot]

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[strongjz]

@Gacko and I will most likely not implement this. It will have to come from a community member. We are currently only doing patch releases. As we have stated before, 1.13 will most certainly be the last minor upgrade.

/help-wanted

[strongjz]

More info here #13002

[scottrigby]

linking discussion #11642