Duplicate editing support (docs / diagnostics) for kustomize files from Cloud Code and the JetBrains Kubernetes plugins

Cloud Code has some overlapping editing features with the JetBrains Kubernetes plugin.

To avoid duplicate suggestions / docs / diagnostics, Cloud Code selectively disabled Kubernetes editing support when the JB plugin is installed.

however, it appears as though Kustomize is not being suppressed. We need to expand this logic to also cover Kustomize.