FIX(headlamp): use ExternalSecret for OIDC config

- Use externalSecret.enabled instead of env
- Add template to ExternalSecret with all OIDC fields

headlamp/helm-values.yaml

@@ -34,15 +34,8 @@ ingress:
 config:
   baseURL: "https://kubernetes0213.kro.kr"
   oidc:
-    clientID: "headlamp"
-    clientSecret: ""
-    issuerURL: "https://auth0213.kro.kr"
-    scopes: "openid profile email groups"
-
-# OIDC client secret from ExternalSecret
-env:
-  - name: HEADLAMP_CONFIG_OIDC_clientSecret
-    valueFrom:
-      secretKeyRef:
-        name: headlamp-oidc
-        key: clientSecret
+    secret:
+      create: false
+    externalSecret:
+      enabled: true
+      name: headlamp-oidc