Can [feature request] Popover support the function of [destroy floating layer when closing floating layer]

### Existing Component
是

### Component Name
popover

### Description
目前没有关闭浮层时销毁浮层的功能

而且官网文档里popper.js的跳转链接不存在

https://element.eleme.cn/#/zh-CN/component/popover

https://popper.js.org/documentation.html