The names of the templates in istio_cni are misleading. For example, there are four clusterrole templates:

• clusterrole.yaml
• clusterrole-v2.4.yaml
• clusterrole-v2.5.yaml
• clusterrole-v2.6.yaml

However, the last three templates all create the same ClusterRole, since they use the same metadata.name: ossm-cni. We shouldn't have multiple templates that create the same resource, so we should merge those three files into one.

This also means that the filename should indicate that the template is used for all three versions (v2.4, v2.5, and v2.6). Also, the clusterrole.yaml file is also used for multiple versions (v2.0 to v2.3), so we should probably rename it as well.