[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/phpbb/Chart.yaml

@@ -6,10 +6,10 @@ appVersion: 3.3.10
 dependencies:
   - condition: mariadb.enabled
     name: mariadb
-    repository: https://charts.bitnami.com/bitnami
+    repository: oci://registry-1.docker.io/bitnamicharts
     version: 11.x.x
   - name: common
-    repository: https://charts.bitnami.com/bitnami
+    repository: oci://registry-1.docker.io/bitnamicharts
     tags:
       - bitnami-common
     version: 2.x.x
@@ -28,4 +28,4 @@ name: phpbb
 sources:
   - https://github.com/bitnami/containers/tree/main/bitnami/phpbb
   - https://www.phpbb.com/
-version: 12.3.15
+version: 12.4.0