Add getPopupContainer method decl to MenuProps interface (#10158)

* add getPopupContainer to MenuProps

see https://github.com/ant-design/ant-design/issues/10145

* Update getPopupContainer signature of MenuProps

* getPopupContainer prop is optional

components/menu/index.tsx

@@ -51,6 +51,7 @@ export interface MenuProps {
   inlineCollapsed?: boolean;
   subMenuCloseDelay?: number;
   subMenuOpenDelay?: number;
+  getPopupContainer?: (triggerNode: Element) => HTMLElement;
 }
 
 export interface MenuState {