change to generate kustomize base files from helm chart

[hhk7734]

Problem The current chart is generated by hack/generate-helm.sh, which makes it difficult to modify the Helm template.

Therefore, I propose generating the base files used for Kustomize from the chart, in the opposite way of the current method.

Persona: System Operator

Exit Criteria Pass existing CI tests using helm chart and kustomize

Time Estimate (optional): 1 developer, 1~2 days

After changes

./
├── config/
│   ├── charts/
│   │   ├── knative-operator/
│   │   │   ├── Chart.yaml
│   │   │   ├── templates/
│   │   │   │   ├── crd/
│   │   │   │   │   └── bases/
│   │   │   │   │       ├── operator.knative.dev_knativeeventings.yaml
│   │   │   │   │       └── operator.knative.dev_knativeservings.yaml
│   │   │   │   ├── manager/
│   │   │   │   │   ├── config-logging-configmap.yaml
│   │   │   │   │   ├── config-observability-configmap.yaml
│   │   │   │   │   └── operator.yaml
│   │   │   │   ├── rbac/
│   │   │   │   │   ├── clusterrole_aggregated.yaml
│   │   │   │   │   ├── clusterrole_aggregated_binding.yaml
│   │   │   │   │   ├── fake_clusterrole_aggregated_binding.yaml
│   │   │   │   │   ├── fake_service_account.yaml
│   │   │   │   │   ├── role.yaml
│   │   │   │   │   ├── role_binding.yaml
│   │   │   │   │   ├── service_account.yaml
│   │   │   │   │   ├── webhook_role.yaml
│   │   │   │   │   ├── webhook_role_binding.yaml
│   │   │   │   │   └── webhook_service_account.yaml
│   │   │   │   ├──  webhook/
│   │   │   │   │   ├── webhook-secret.yaml
│   │   │   │   │   ├── webhook-service.yaml
│   │   │   │   │   └── webhook.yaml
│   │   │   │   └──  ...
│   │   │   └── values.yaml
│   │   └──  ...
│   ├── crd/
│   │   └──  ...
│   ├── manager/
│   │   └──  ...
│   ├── rbac/
│   │   └──  ...
│   ├── webhook/
│   │   └──  ...
│   └──  ...
├── hack/
│   ├── generate-kustomize.sh
│   └──  ...
└──  ...

[houshengbo]

@hhk7734 Knative operator now has to publish the artifacts in three ways: general yaml on the release page, operatorhub and the helm charts. The current structure is crucial for https://github.com/knative/operator/blob/main/hack/generate-bundle.sh, which is to generate the bundle to publish in operatorhub. I am wondering if you can take this into account as well to optimize the structure of the yamls.

[hhk7734]

I expect the generate-bundle.sh script to work just fine, since I'm aiming to create config/** from config/charts as is. I'll work on it as soon as I have time and make a PR, so please review again then.

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