1. the agg function without distinct keyword should be a "merge" funcion in threePhaseAggregateWithDistinct
2. use aggregateParam.aggMode.consumeAggregateBuffer instead of aggregateParam.aggPhase.isGlobal() to indicate if a agg function is a "merge" function
3. add an AvgDistinctToSumDivCount rule to support avg(distinct xxx) in some case
4. AggregateExpression's nullable method should call inner function's nullable method.
5. add a bind slot rule to bind pattern "logicalSort(logicalHaving(logicalProject()))"
6. don't remove project node in PhysicalPlanTranslator
7. add a cast to bigint expr when count( distinct datelike type )
8. fallback to old optimizer if bitmap runtime filter is enabled.
9. fix exchange node mem leak
