REFACTOR(traefik): migrate all ingresses

- from NGINX to HAProxy
- Changed all ingressClassName from nginx to haproxy
- Updated NGINX to ClusterIP mode (backup)
- Set HAProxy as default ingress controller
- Affected files:
  - ingress-nginx/ingress.yaml (22 ingresses)
  - vault/helm-values/vault.yaml (1 ingress)
  - haproxy/argocd/haproxy.yaml (controller config)
  - ingress-nginx/helm-values/ingress-nginx.yaml (backup mode)

This completes the migration to HAProxy as the primary ingress
controller.

vault/helm-values/vault.yaml

@@ -25,7 +25,7 @@ server:
   # Ingress 설정
   ingress:
     enabled: true
-    ingressClassName: nginx
+    ingressClassName: haproxy
     hosts:
       - host: vault0213.kro.kr
         paths: