Revert incremental change lookup. #746

Job	Run time
Core Test	1m 31s
Build and Test PowerSync Service	1m 30s
MongoDB Test (6.0)	2m 12s
MongoDB Test (7.0)	2m 19s
MySQL Test (5.7)	1m 46s
Postgres Test (11)	6m 53s
MongoDB Test (8.0)	2m 12s
MySQL Test (8)	1m 39s
Postgres Test (12)	6m 59s
MySQL Test (8.4)	1m 45s
Postgres Test (13)	6m 44s
Postgres Test (14)	6m 55s
Postgres Test (15)	6m 52s
Postgres Test (16)	6m 40s
	55m 57s

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