Update kubeflow/model-registry manifests from v0.2.0-alpha

[rimolive]

Which issue is resolved by this Pull Request:
Supersedes #2694

Description of your changes:

Checklist:

• Unit tests pass:
  Make sure you have installed kustomize == 5.2.1+
  1. make generate-changed-only
  2. make test

[juliusvonkohout]

We should update the model registry synchronization script as I did for Katib in #2698

[lampajr]

Thanks @rimolive, note that the manifests README and OWNERS files that have been added with kubeflow/model-registry#69 were not included in v0.2.0-alpha tag yet (as the PR has been merged yesterday).

As temporary solution, if really needed, we could add them manually as part of this PR. Wdyt?

[rimolive]

@lampajr Done

[rimolive]

/hold

Found an issue in the sync script.

[rimolive]

/unhold

[rimolive]

cc @juliusvonkohout

[juliusvonkohout]

networkpolicies etc. in follow up PRs

/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: juliusvonkohout, lampajr, rimolive

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