feat add infrastructure ref kind to clusters

cmd/clusters-service/api/cluster_services.proto

@@ -410,6 +410,7 @@ message CapiCluster {
   map<string, string> annotations = 3;
   map<string, string> labels = 4;
   CapiClusterStatus status = 5;
+  CapiClusterInfrastructureRef infrastructureRef = 6;
 }
 
 message CapiClusterStatus {
@@ -421,6 +422,12 @@ message CapiClusterStatus {
   int64 observedGeneration = 6;
 }
 
+message CapiClusterInfrastructureRef {
+  string apiVersion = 1;
+  string kind = 2;
+  string name = 3;
+}
+
 message GitopsClusterRef { string name = 1; }
 
 message Credential {

cmd/clusters-service/api/cluster_services.swagger.json

@@ -773,6 +773,23 @@
         },
         "status": {
           "$ref": "#/definitions/v1CapiClusterStatus"
+        },
+        "infrastructureRef": {
+          "$ref": "#/definitions/v1CapiClusterInfrastructureRef"
+        }
+      }
+    },
+    "v1CapiClusterInfrastructureRef": {
+      "type": "object",
+      "properties": {
+        "apiVersion": {
+          "type": "string"
+        },
+        "kind": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
         }
       }
     },