fix: bson type handling cleanup #4914

Job	Run time
Build	2m 23s
Python Binding Tests	5m 11s
Node.js Binding Tests	4m 0s
Unit Tests	4m 56s
Lint and Format	2m 41s
PG Protocol Tests	5m 8s
Process Integration Tests (pytest)	1m 0s
SQL Logic Tests (postgres)	3m 55s
Service Integration Tests (SLT)	16m 38s
SQL Logic Tests (flightsql)	4m 5s
Snowflake Service Integration Tests (SLT::Snowflake)	5m 15s
	55m 12s

Provide feedback