dropdown下menu中有popconfirm，menu-item上的key失效

[Xin-arwanas]

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

Version

4.2.1

Environment

mac, chrome

Reproduction link

Steps to reproduce

dropdown下menu中有至少两个popconfirm，menu-item上的key失效，会出menuItem hover时另一个popconfirm的menuItem也被hover

<a-dropdown :trigger="['hover']">
    <a-button>1</a-button>
    <template #overlay>
      <a-menu>
        <a-menu-item :key="1">
          <a-button>1</a-button>
        </a-menu-item>
        <a-popconfirm>
          <a-menu-item :key="2">
            <a-button>2</a-button>
          </a-menu-item>
        </a-popconfirm>
        <a-popconfirm>
          <a-menu-item :key="3">
            <a-button>3</a-button>
          </a-menu-item>
        </a-popconfirm>
      </a-menu>
    </template>
</a-dropdown>

What is expected?

正确分配key，有两个及以上popconfirm时不会相互出现hover样式

What is actually happening?

hover其中一个popconfirm的menuItem时，另外的popconfirm menuItem也会被hover