cascader multi-select highlighted is not already selected

[Js-Man-H5]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

防止误导用户、希望给出高亮的active 可以自定义参数、而不是我选中和高亮展开分离、

What does the proposed API look like?

"vue": "^3.0.0",
"ant-design-vue": "^3.0.0-beta.9",