Input使用allow-clear时，希望hover时再显示clear图标

[lanrenbulan]

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

What problem does this feature solve?

与select组件的clear保持一致

What does the proposed API look like?

input组件在allow-clear的情况下，clear图标在hover时才显示

[tangjinzhou]

antd 规范如此，你可以自行使用 css 覆盖样式

[github-actions]

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