Optimizing queries with multiple aggregations where one Is aggregating on DISTINCT

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
Inspired by #1315, I think we can also do the optimization.

**Describe the solution you'd like**
Ref: https://www.qubole.com/blog/presto-optimizes-aggregations-over-distinct-values/

**Describe alternatives you've considered**
No

**Additional context**
Related PR: #1315 
