Allow using a connection with a SCN set to write data to tables EXCEPT transactional tables or mutable tables with indexes or tables with a ROW_TIMESTAMP column

Currently If a SCN is set on a connection it is read-only. We only need to prevent a client from using a connection with a SCN set to upsert data for:
1) transactional tables
2) mutable tables with indexes
3) tables with a ROW_TIMESTAMP column