fix: keepAlive not working for popup appendToMain (#5666)

* 修复弹窗和抽屉 `appendToMain` 时且启用`keepAlive` 时未能正确缓存的问题

playground/src/views/examples/modal/index.vue

@@ -14,6 +14,8 @@ import InContentModalDemo from './in-content-demo.vue';
 import NestedDemo from './nested-demo.vue';
 import SharedDataDemo from './shared-data-demo.vue';
 
+defineOptions({ name: 'ModalExample' });
+
 const [BaseModal, baseModalApi] = useVbenModal({
   // 连接抽离的组件
   connectedComponent: BaseDemo,