Add a workflow for publishing Helm charts

[ChenYi015]

What you would like to be added?

Add a GitHub action workflow for:

• Publishing helm charts to GHCR, so user can install the trainer Helm chart by specifying OCI image repository and version:

  helm install kubeflow-trainer oci://ghcr.io/kubeflow/helm-charts/kubeflow-trainer
      --version 2.0.0 \
      --namespace kubeflow-system \
      --create-namespace

• (Optional) Using GH page to host the Helm charts index file index.yaml, so users are able to add trainer as a Helm chart repo like:

  helm repo add kubeflow-trainer https://kubeflow.github.io/trainer

  In this way, users only need to add the Helm repo once and then they can:

  # Update Helm repo index
  helm repo update
  
  # Search repo for available versions of kubeflow-trainer
  helm search repo kubeflow-trainer --versions
  
  # Install the latest version
  helm install kubeflow-trainer kubeflow-trainer/kubeflow-trainer \
      --namespace kubeflow-system \
      --create-namespace
  
  # Install a specified version
  helm install kubeflow-trainer kubeflow-trainer/kubeflow-trainer \
      --version 2.0.0 \
      --namespace kubeflow-system \
      --create-namespace
  

Why is this needed?

Set a workflow to publish Helm charts automatically.

Love this feature?

Give it a 👍 We prioritize the features with most 👍

[andreyvelich]

/remove-label lifecycle/needs-triage
/good-first-issue
/area deployment

[google-oss-prow]

@andreyvelich:
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Please ensure the request meets the requirements listed here.

If this request no longer meets these requirements, the label can be removed
by commenting with the /remove-good-first-issue command.

In response to this:

/remove-label lifecycle/needs-triage
/good-first-issue
/area deployment

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[RasButAss]

Hey I was looking to contribute to this issue. Can I start working on it?

[andreyvelich]

Sure, thank you for your time @RasButAss!
While we are finalizing the Helm Chart PR, you can start working on GitHub action to publish it: #2435
/assign @RasButAss