feat: add e2e tests to Helm CI workflow

[Goku2099]

This PR extends the existing Helm CI workflow by adding an E2E validation step.

#3230

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[Copilot]

Pull request overview

This PR extends the Helm CI workflow to run end-to-end validation by provisioning a Kind cluster and executing the Go E2E test suite, addressing Issue #3230.

Changes:

• Add a Kind cluster setup step to the Helm CI workflow.
• Run Go E2E tests (make test-e2e) as part of the Helm workflow.

[andreyvelich]

You need to update this script to deploy Trainer control plane via Helm charts.
Currently, it only uses Kustomize manifests: https://github.com/kubeflow/trainer/blob/master/hack/e2e-setup-cluster.sh#L53
/hold

[Goku2099]

@andreyvelich The Coveralls step is failing with HTTP 530 (error code 1016).

This appears to be an external Coveralls issue rather than a CI or coverage configuration problem. The coverage file is generated successfully, but the upload fails.

Could you please confirm if we should re-run the job or temporarily ignore this failure?

[Goku2099]

@andreyvelich can you review this one too.