Synchronize Helm charts with Kustomize manifests (katib v0.19.0, model-registry v0.3.7, kserve-models-web-application 0.16.0)

[kunal-511]

Pull Request Template for Kubeflow Manifests

✏️ Summary of Changes

katib helm charts: bump to v0.19.0
model-registry helm charts: bump server/ui to v0.3.7, postgres to 16-alpine
kserve-models-web-app helm charts: bump to 0.16.0

📦 Dependencies

List any dependencies or related PRs (e.g., "Depends on #123").

🐛 Related Issues

Link any issues that are resolved or affected by this PR.

✅ Contributor Checklist

• I have tested these changes with kustomize. See Installation Prerequisites.
• All commits are signed-off to satisfy the DCO check.
• I have considered adding my company to the adopters page to support Kubeflow and help the community, since I expect help from the community for my issue (see 1. and 2.).

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[github-actions]

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[Copilot]

Pull request overview

Updates experimental Helm charts to stay aligned with the corresponding Kustomize manifests, primarily by bumping component versions (Katib v0.19.0, Model Registry v0.3.7, KServe Models Web App v0.16.0) and adjusting related chart configuration.

Changes:

• Bump image tags for Model Registry, Katib, and KServe Models Web App.
• Update Katib chart configuration generation (templated KatibConfig) and extend controller RBAC (e.g., JobSet/TrainJob support).
• Adjust database probe commands in Katib/Model Registry MySQL templates and update default Postgres image tag for Model Registry.

Reviewed changes

Copilot reviewed 23 out of 23 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
experimental/helm/charts/model-registry/values.yaml	Bumps Model Registry images and updates default Postgres image tag.
experimental/helm/charts/model-registry/templates/database/mysql/deployment.yaml	Tweaks MySQL readiness probe to connect via localhost.
experimental/helm/charts/model-registry/ci/values-ui.yaml	CI values bump UI tag to v0.3.7.
experimental/helm/charts/model-registry/ci/values-ui-standalone.yaml	CI values bump UI tag to v0.3.7.
experimental/helm/charts/model-registry/ci/values-ui-istio.yaml	CI values bump UI tag to v0.3.7.
experimental/helm/charts/model-registry/ci/values-ui-integrated.yaml	CI values bump UI tag to v0.3.7.
experimental/helm/charts/model-registry/ci/values-postgres.yaml	CI values bump server tag and Postgres tag.
experimental/helm/charts/model-registry/ci/values-db.yaml	CI values bump server tag to v0.3.7.
experimental/helm/charts/model-registry/ci/ci-values.yaml	CI values bump server tag to v0.3.7.
experimental/helm/charts/kserve-models-web-app/values.yaml	Bumps app version to 0.16.0; adds Gunicorn args and useridPrefix.
experimental/helm/charts/kserve-models-web-app/templates/configmap.yaml	Adds USERID_PREFIX; stops copying app env entries into ConfigMap keys.
experimental/helm/charts/katib/values.yaml	Bumps Katib to v0.19.0; updates MySQL tag; refactors default Katib config inputs.
experimental/helm/charts/katib/templates/database/mysql-deployment.yaml	Changes MySQL readiness/liveness probe commands; removes startupProbe.
experimental/helm/charts/katib/templates/controller/rbac.yaml	Adds JobSet rule and updates TrainJob verb ordering.
experimental/helm/charts/katib/templates/config/configmap.yaml	Generates KatibConfig from structured values unless overridden.
experimental/helm/charts/katib/ci/values-standalone.yaml	CI values bump imageTag to v0.19.0.
experimental/helm/charts/katib/ci/values-production.yaml	CI values bump imageTag to v0.19.0.
experimental/helm/charts/katib/ci/values-postgres.yaml	CI values bump imageTag; overrides trialResources.
experimental/helm/charts/katib/ci/values-openshift.yaml	CI values bump imageTag and embedded images in katibConfig.
experimental/helm/charts/katib/ci/values-leader-election.yaml	CI values bump imageTag and embedded images in katibConfig.
experimental/helm/charts/katib/ci/values-kubeflow.yaml	CI values bump imageTag and embedded images in katibConfig; adds TrainJob.
experimental/helm/charts/katib/ci/values-external-db.yaml	CI values bump imageTag; overrides trialResources.
experimental/helm/charts/katib/ci/values-cert-manager.yaml	CI values bump imageTag and embedded images in katibConfig; adds TrainJob.

[juliusvonkohout]

Thank you
/lgtm
/approve

[google-oss-prow]

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