QueryConfig documentation clean up #12757

Job	Run time
Build	50m 33s
Spark Aggregate Fuzzer	15m 47s
Presto Fuzzer	30m 50s
Join Fuzzer	17m 31s
Presto Bias Fuzzer	0s
Exchange Fuzzer	16m 38s
Aggregation Fuzzer with Presto as source of truth	17m 33s
Biased Aggregation Fuzzer with Presto as source of truth	0s
Window Fuzzer with Presto as source of truth	17m 33s
Writer Fuzzer with Presto as source of truth	17m 37s
RowNumber Fuzzer	15m 56s
Spark Bias Fuzzer	0s
Spark Fuzzer	15m 45s
Signature Changes	2s
	3h 35m 45s

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