[bitnami/*] Make Helm charts 100% OCI (#15998)

* [bitnami/*] Make Helm charts 100% OCI

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

* Add main files and scaffolding

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

* Bump chart version

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

* Improve helm upgrade instruction

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

* Revert bitnami/common version bump

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

* Prettify Chart.yamls

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

* Regenerate Chart.lock and bump chart versions

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

---------

Signed-off-by: Carlos Rodríguez Hernández <carlosrh@vmware.com>

bitnami/node-exporter/Chart.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: common
-  repository: https://charts.bitnami.com/bitnami
+  repository: oci://registry-1.docker.io/bitnamicharts
   version: 2.2.4
-digest: sha256:634d19e9b7f6e4c07d7c04a0161ab96b3f83335ebdd70b35b952319ef0a2586b
-generated: "2023-03-18T23:13:06.7830269Z"
+digest: sha256:829fc25cbbb396161e735c83d152d74a8b3a82d07f08866b885b812d30b920df
+generated: "2023-04-20T09:35:10.150607+02:00"

bitnami/node-exporter/Chart.yaml

@@ -5,7 +5,7 @@ apiVersion: v2
 appVersion: 1.5.0
 dependencies:
   - name: common
-    repository: https://charts.bitnami.com/bitnami
+    repository: oci://registry-1.docker.io/bitnamicharts
     tags:
       - bitnami-common
     version: 2.x.x
@@ -24,4 +24,4 @@ sources:
   - https://github.com/bitnami/containers/tree/main/bitnami/node-exporter
   - https://github.com/prometheus/node_exporter
   - https://prometheus.io/
-version: 3.3.4
+version: 3.4.0

bitnami/node-exporter/README.md

@@ -11,8 +11,7 @@ Trademarks: This software listing is packaged by Bitnami. The respective tradema
 ## TL;DR
 
 ```console
-helm repo add my-repo https://charts.bitnami.com/bitnami
-helm install my-release my-repo/node-exporter
+helm install my-release oci://registry-1.docker.io/bitnamicharts/node-exporter
 ```
 
 ## Introduction
@@ -31,8 +30,7 @@ Bitnami charts can be used with [Kubeapps](https://kubeapps.dev/) for deployment
 To install the chart with the release name `my-release`:
 
 ```console
-helm repo add my-repo https://charts.bitnami.com/bitnami
-helm install my-release my-repo/node-exporter
+helm install my-release oci://registry-1.docker.io/bitnamicharts/node-exporter
 ```
 
 The command deploys Node Exporter on the Kubernetes cluster in the default configuration. The [configuration](#configuration-and-installation-details) section lists the parameters that can be configured during installation.
@@ -175,13 +173,13 @@ The command removes all the Kubernetes components associated with the chart and
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example the following command sets the `minReadySeconds` of the Node Exporter Pods to `120` seconds.
 
 ```console
-helm install my-release --set minReadySeconds=120 my-repo/node-exporter
+helm install my-release --set minReadySeconds=120 oci://registry-1.docker.io/bitnamicharts/node-exporter
 ```
 
 Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,
 
 ```console
-helm install my-release -f values.yaml my-repo/node-exporter
+helm install my-release -f values.yaml oci://registry-1.docker.io/bitnamicharts/node-exporter
 ```
 
 > **Tip**: You can use the default [values.yaml](values.yaml)
@@ -207,7 +205,7 @@ Find more information about how to deal with common errors related to Bitnami's
 ## Upgrading
 
 ```console
-helm upgrade my-release my-repo/node-exporter
+helm upgrade my-release oci://registry-1.docker.io/bitnamicharts/node-exporter
 ```
 
 ### To 3.0.0