PLUGIN-1925: Introduce Custom BigDecimal Splitter #1633

Job	Run time
build (mysql-plugin)	1h 18m 17s
build (postgresql-plugin)	46m 33s
build (cloudsql-mysql-plugin)	1h 52m 32s
build (mssql-plugin)	1h 45m 42s
build (oracle-plugin)	2h 17m 21s
build (cloudsql-postgresql-plugin)	51m 17s
	8h 51m 42s

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