Datastream now supports replicating SQL Server GEOMETRY and GEOGRAPHY spatial data types

## Feature Feature Datastream now supports replicating SQL Server `GEOMETRY` and`GEOGRAPHY` spatial data types. For more information, see the following: * [Map SQL Server data types to Datastream unified types](https://cloud.google.com/datastream/docs/unified-types#map-sqlserver) * [Data type mappings in BigQuery](https://cloud.google.com/datastream/docs/bq-map-data-types)