[FEA] Support segmented reductions (MIN/MAX/COUNT DISTINCT) in cuDF `list` accessor

**Is your feature request related to a problem? Please describe.**

Currently, we use cuDF to implement distributed group aggregation operations. That is, GROUP BY + DISTINCT is performed on the local node, and GROUP BY + MIN/MAX/COUNT DISTINCT are performed on the merge node. The LIST is transferred as an intermediate format, but the aggregation operation cannot be implemented.

**Describe the solution you'd like**

Group + Aggregation supports the list format.


**Describe alternatives you've considered**

Aggregation operators are supported in the list format. For example, the current list supports only `len`, and aggregation operators such as `count`, `min`, `max`, and `avg` are expected to be added.