Calculate roll-up cumulatively

[sopel39]

Currently, rollup on x, y, z will translate into plan:

FinalAggregregation[$id, x, y, z](aggr)
  RemoteExchange
    PartialAggregation[$id, x, y, z](aggr)
      GroupId

GroupId operator will multiply unaggregated input data 4 times (for groups [], [x], [x,y], [x,y,z]).

PartialAggregation will consume unaggregated input for each grouping set. However, aggregations could be calculated in a cascade way, e.g:

PartialAggregation[$id=0][source: $id=1](aggr)
  PartialAggregation[$id=1, x][source: $id=2](aggr)
    PartialAggregation[$id=2, x, y][source: $id=3](aggr)
      PartialAggregation[$id=3, x, y, z](aggr)
        GroupId

Downstream PartialAggregations would use already partially aggregated results from wider grouping set, while passing through input rows.

This would reduce CPU, but also improve PartialAggregation efficiency as each aggregation is computed with separate operator

[sopel39]

Initial branch https://github.com/starburstdata/trino/tree/ks/rollup