[FEA] Support min/max aggregation/reduction for arrays of structs and arrays of strings

[revans2]

Is your feature request related to a problem? Please describe.
This is in reference to #4900 specifically the part

!Expression <Min> min(yyyyy#504) cannot run on GPU because expression Min min(xxx#504) produces an unsupported type ArrayType(StructType(StructField(count,LongType,true), StructField(yyy,LongType,true)),true); input expression AttributeReference xxx#504 (ArrayType(StructType(StructField(count,LongType,true), StructField(yyy,LongType,true)),true) is not supported) 

and

!Expression <Min> min(xxx#28) cannot run on GPU because expression Min min(xxx#28) produces an unsupported type ArrayType(StringType,true); input expression AttributeReference xxx#28 (ArrayType(StringType,true) is not supported) 

Describe the solution you'd like
We would like to support at least min aggregations on arrays of structs with basic fields. max would be great to support too, and even better if we can just solve ordering for arrays in the general case. Similarly we would like to do the same for arrays of strings.

Describe alternatives you've considered
In this particular case we could hack something together, but we should not do that.

[revans2]

This depends on rapidsai/cudf#10408

[ttnghia]

This can be re-prioritized if needed. Cudf dependency is almost done.