Add new `SUB_TYPE` field to `type: ITEM` (MAPCO-5084)

For ITEMS, we have added new SUB_TYPE property in order to distinguish between different types of control_points.
possible values are now:

1. CONTROL_CROSS
2. CONTROL_INFRASTRUCTURE
3. CONTROL_POINT

We need to add it to our mock data, to generateDisplayName control response function, and to the config's application.controlObjectDisplayNamePrefixes

首先定位 mock 数据、generateDisplayName control response 函数以及配置项 application.controlObjectDisplayNamePrefixes。在每个位置为列出的三个 SUB_TYPE 值添加支持，然后验证生成的 control display name 和配置行为是否反映了新字段。