release helm chart as OCI artifact

[nissessenap]

Feature search

• I have searched the existing issues and this feature has not been requested yet or is already in our Public Roadmap

Which component would this feature affect?

Helm chart

Related to specific cloud provider?

Not provider-specific

New feature motivation

Having a helm chart that isn't possible to use as an artifact is a pain.

Solution Proposed

Upload the helm chart as a OCI artifact.
Look at https://github.com/grafana/grafana-operator/blob/1c66e0167b4efdef894422c3b9bb1f9704d1b5ee/.github/workflows/release.yaml#L15-L50C88 for insperation on how todo it. It's very simple and you don't have to manage and index.yaml page.

Use case and benefits

Any user can deploy prowler without first having to download the repo and manaully copy the helm chart.

Describe alternatives you've considered

Host a index.yaml page, but this was shut down during the intial PR of the helm chart.
#9835 (comment)

Additional context

See #9835

[nissessenap]

@Utwo I think using a OCI helm chart will make it easy enough to maintain and you will still be able to use it from a GitOps point of view.
Great job with the new helm chart 🎆 🌟