[VL] Settings to lower partial agg memory usage

[zhztheplayer]

Tuning following 4 options if encountering partial agg OOM:

// <key>=<default value>
spark.gluten.sql.columnar.backend.velox.maxPartialAggregationMemoryRatio=0.1 // lower this
spark.gluten.sql.columnar.backend.velox.maxExtendedPartialAggregationMemoryRatio=0.5 // lower this 
spark.gluten.sql.columnar.backend.velox.abandonPartialAggregationMinPct=90 // lower this
spark.gluten.sql.columnar.backend.velox.abandonPartialAggregationMinRows=100000 // lower this

A typical setting to make partial agg abandoned immediately (not recommended):

spark.gluten.sql.columnar.backend.velox.maxPartialAggregationMemoryRatio=0.0
spark.gluten.sql.columnar.backend.velox.maxExtendedPartialAggregationMemoryRatio=0.0
spark.gluten.sql.columnar.backend.velox.abandonPartialAggregationMinPct=0
spark.gluten.sql.columnar.backend.velox.abandonPartialAggregationMinRows=0