Update to Seldon 1.18.x and the corresponding owners file and github workflow

[juliusvonkohout]

We want to support Kubernetes 1.27 -1.29 in Kubeflow 1.9 and should update to Seldon 1.18+

https://docs.seldon.io/projects/seldon-core/en/latest/reference/upgrading.html

and there is discussion in #2532 (comment)

@rimolive @adriangonz @ramonpzg

[rimolive]

Who are the code owners for Seldon? Is there an ETA for that upgrade?

I don't think this is a blocker for KF 1.9 and Seldon is not part of the core components, but if they're willing to do that we can plan for a patch release in 1.9.

[juliusvonkohout]

The new code owners are described in #2532 (comment)

We can also write a synchronization script ourselves.

[rimolive]

Your call. As far as I know the manifest sync scripts are only for the core components, and since we need to write one for Model Registry (the team is about to send a PR for it) we can try write one for Seldon if, and only if, this won't take much time and effort. We have to set hard feature freeze date by Apr 22nd or the original schedule might be compromised.

[juliusvonkohout]

@lampajr can you tackle this and add a synchronization script as well?

[lampajr]

@lampajr can you tackle this and add a synchronization script as well?

Hi Julius, I gave it a quick try following https://github.com/kubeflow/manifests/blob/master/contrib/seldon/UPGRADE.md but it looks like the chart for the latest v1.18.1 release are not present in the helm chart repo https://storage.googleapis.com/seldon-charts

Do you know how can we get those charts there?

[juliusvonkohout]

@lampajr Maybe from here https://docs.seldon.io/projects/seldon-core/en/latest/workflow/install.html#seldon-core-kustomize-install

[lampajr]

@lampajr Maybe from here https://docs.seldon.io/projects/seldon-core/en/latest/workflow/install.html#seldon-core-kustomize-install

I think I can find a way directly cloning the seldon-core repo, will try this later today