REFACTOR(traefik): switch from HAProxy

- to Traefik ingress controller
- Update all ingress files to use ingressClassName: traefik
- Update cert-manager ClusterIssuer to use traefik class
- Remove haproxy.org annotations from ingress files
- Update vault helm-values to use traefik

vault/helm-values.yaml

@@ -45,7 +45,7 @@ server:
   # Ingress 설정
   ingress:
     enabled: true
-    ingressClassName: haproxy
+    ingressClassName: traefik
     annotations:
       cert-manager.io/cluster-issuer: letsencrypt-prod
     hosts: