Improve Oracle support

Improves support for Oracle support by:
- Fixing pagination by qualifying the column wildcard
- Changing `OracleDatabaseType` provider from the deprecated `System.Data.OracleClient` to `Oracle.DataAccess.Client`
- Adds a new database type `OracleManagedDatabaseType` for Oracle's managed provider `Oracle.ManagedDataAccess.Client` (which doesn't require a client install) -