authelia: Set up OIDC for k8s API server

Enabling OpenID Connect authentication for the Kubernetes API server
will allow clients, particularly `kubectl` to log in without needing
TLS certificates and private keys.

authelia/kustomization.yaml

@@ -3,6 +3,7 @@ kind: Kustomization
 
 resources:
 - authelia.yaml
+- oidc-cluster-admin.yaml
 
 configMapGenerator:
 - name: authelia