fix: adding an upgrade pending status

Author: burythehammer

service/databases/model.go

@@ -264,7 +264,7 @@ const (
 	StatusActiveChangePending = "active-change-pending"
 	// StatusDynamicEndpointsCreationPending is the Dynamic endpoints creation pending value of the `Status` field in `Database`
 	StatusDynamicEndpointsCreationPending = "dynamic-endpoints-creation-pending"
-
+	StatusActiveUpgradePending            = "active-upgrade-pending"
 	// StatusProxyPolicyChangePending and StatusProxyPolicyChangeDraft
 	//The below two Proxy Policy states are caused by a change to the 'support_oss_cluster_api' attribute
 	// StatusProxyPolicyChangePending is the Proxy Policy change pending value of the `Status` field in `Database`.