fix(gateways): add explicit group: "" to all certificateRefs entries

The Gateway API admission server defaults certificateRefs[].group to ""
when it is omitted. ArgoCD diffed the desired state (no group field) against
the live state (group: "") and flagged every gateway as out of sync.

Fix: explicitly set group: "" in all certificateRefs entries so the
rendered manifest matches the API server's canonical form exactly.

Affected: artifactapi, cattle-system, consul, litellm, paperclip,
puppet (puppetboard + puppetdb), vault.

apps/base/artifactapi/gateway.yaml

@@ -31,6 +31,7 @@ spec:
       protocol: HTTPS
       tls:
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: artifactapi-tls
         mode: Terminate

apps/base/cattle-system/gateway.yaml

@@ -31,6 +31,7 @@ spec:
       protocol: HTTPS
       tls:
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: rancher-tls
         mode: Terminate

apps/base/consul/gateway.yaml

@@ -35,7 +35,8 @@ spec:
       tls:
         mode: Terminate
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: consul-tls
     - name: consul-svc
       port: 443
@@ -47,5 +48,6 @@ spec:
       tls:
         mode: Terminate
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: consul-tls

apps/base/litellm/gateway.yaml

@@ -31,6 +31,7 @@ spec:
       protocol: HTTPS
       tls:
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: litellm-tls
         mode: Terminate

apps/base/paperclip/gateway.yaml

@@ -31,6 +31,7 @@ spec:
       protocol: HTTPS
       tls:
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: paperclip-tls
         mode: Terminate

apps/base/puppet/gateway_puppetboard.yaml

@@ -35,6 +35,7 @@ spec:
       protocol: HTTPS
       tls:
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: puppetboard-tls
         mode: Terminate

apps/base/puppet/gateway_puppetdb.yaml

@@ -28,6 +28,7 @@ spec:
       protocol: HTTPS
       tls:
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: puppetdb-tls
         mode: Terminate

apps/base/vault/gateway.yaml

@@ -35,7 +35,8 @@ spec:
       tls:
         mode: Terminate
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: vault-tls
     - name: vault-direct
       port: 8200
@@ -46,5 +47,6 @@ spec:
       tls:
         mode: Terminate
         certificateRefs:
-          - kind: Secret
+          - group: ""
+            kind: Secret
             name: vault-tls