[CX] Out of memory error during aggregation

Tracking open source issue: https://issues.apache.org/jira/browse/ASTERIXDB-2481

Out of Memory error doing aggregation for the following query:

SELECT min(t.oddOnePercent) as min, max(t.oddOnePercent) as max, count(distinct t.oddOnePercent) as cnt FROM wisconsin_5gb t;

We need to fix the following:

1. Listify function runtime should be aware of the query memory budget
2. This query needs to be optimized so there's no listify in the final plan.