refactor: IntDecoder #14786

Job	Run time
Build	48m 51s
Build with Clang	0s
Spark Aggregate Fuzzer	15m 46s
Presto Fuzzer	15m 44s
Spark Fuzzer	15m 45s
Presto Bias Fuzzer	0s
Exchange Fuzzer	16m 33s
Aggregation Fuzzer with Presto as source of truth	17m 36s
Join Fuzzer	17m 29s
Window Fuzzer with Presto as source of truth	17m 34s
RowNumber Fuzzer	15m 51s
Spark Bias Fuzzer	0s
Signature Changes	2s
Biased Aggregation Fuzzer with Presto as source of truth	0s
Biased Expression Fuzzer with Only Added/Updated Functions and Presto as source of truth	0s
Writer Fuzzer with Presto as source of truth	17m 23s
	3h 18m 34s

Provide feedback