The proposed solution for SERVER-84734 is to remove the size validation inside the BSONObj constructor that checks that any BSON object is below the internal limit of 16MB+16KB, and check that it is less than the Buffer Max Limit of 125 MB instead. There are currently several tests across the server that will fail as a result of this change, as they rely on the implicit size check within the constructor

The code paths being checked in these tests need to be updated to do their own size validation if necessary before/alongside the change is made for SERVER-84734.