Handle error returned by GetClusterInfos() (#30919)

A recent change to the enterprise cluster code introduced a change to the enterprise API interface. GetClusterInfos() can now return an error. This commit introduces code to handle that error.

server/einterfaces/cluster.go

@@ -21,7 +21,7 @@ type ClusterInterface interface {
 	// and zero means "totally healthy".
 	HealthScore() int
 	GetMyClusterInfo() *model.ClusterInfo
-	GetClusterInfos() []*model.ClusterInfo
+	GetClusterInfos() ([]*model.ClusterInfo, error)
 	SendClusterMessage(msg *model.ClusterMessage)
 	SendClusterMessageToNode(nodeID string, msg *model.ClusterMessage) error
 	NotifyMsg(buf []byte)

server/einterfaces/mocks/ClusterInterface.go

@@ -87,7 +87,7 @@ func (_m *ClusterInterface) GetClusterId() string {
 }
 
 // GetClusterInfos provides a mock function with given fields:
-func (_m *ClusterInterface) GetClusterInfos() []*model.ClusterInfo {
+func (_m *ClusterInterface) GetClusterInfos() ([]*model.ClusterInfo, error) {
 	ret := _m.Called()
 
 	if len(ret) == 0 {
@@ -95,6 +95,10 @@ func (_m *ClusterInterface) GetClusterInfos() []*model.ClusterInfo {
 	}
 
 	var r0 []*model.ClusterInfo
+	var r1 error
+	if rf, ok := ret.Get(0).(func() ([]*model.ClusterInfo, error)); ok {
+		return rf()
+	}
 	if rf, ok := ret.Get(0).(func() []*model.ClusterInfo); ok {
 		r0 = rf()
 	} else {
@@ -103,7 +107,13 @@ func (_m *ClusterInterface) GetClusterInfos() []*model.ClusterInfo {
 		}
 	}
 
-	return r0
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
 }
 
 // GetClusterStats provides a mock function with given fields: rctx