feat: Support prefix comparator in spill merge #15238

Job	Run time
Build	49m 21s
Build with Clang	0s
Spark Aggregate Fuzzer	15m 54s
Presto Fuzzer	31m 1s
Join Fuzzer	17m 45s
Aggregation Fuzzer with Presto as source of truth	28m 41s
Exchange Fuzzer	15m 51s
Presto Bias Fuzzer	0s
RowNumber Fuzzer	15m 37s
Spark Fuzzer	15m 43s
Spark Bias Fuzzer	0s
Signature Changes	3s
Biased Aggregation Fuzzer with Presto as source of truth	0s
Window Fuzzer with Presto as source of truth	17m 35s
Biased Expression Fuzzer with Only Added/Updated Functions and Presto as source of truth	0s
Writer Fuzzer with Presto as source of truth	17m 21s
	3h 44m 52s

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