ClusterDiscoveryStore migration (#14970)

Automatic Merge

store/store.go

@@ -394,12 +394,12 @@ type AuditStore interface {
 }
 
 type ClusterDiscoveryStore interface {
-	Save(discovery *model.ClusterDiscovery) *model.AppError
-	Delete(discovery *model.ClusterDiscovery) (bool, *model.AppError)
-	Exists(discovery *model.ClusterDiscovery) (bool, *model.AppError)
-	GetAll(discoveryType, clusterName string) ([]*model.ClusterDiscovery, *model.AppError)
-	SetLastPingAt(discovery *model.ClusterDiscovery) *model.AppError
-	Cleanup() *model.AppError
+	Save(discovery *model.ClusterDiscovery) error
+	Delete(discovery *model.ClusterDiscovery) (bool, error)
+	Exists(discovery *model.ClusterDiscovery) (bool, error)
+	GetAll(discoveryType, clusterName string) ([]*model.ClusterDiscovery, error)
+	SetLastPingAt(discovery *model.ClusterDiscovery) error
+	Cleanup() error
 }
 
 type ComplianceStore interface {