Investigate leveraging GeoWebCache tiles when exporting GeoPackages

[emxsys]

Consider adding the WMS vendor parameter tiled=true to the GetMap request. For more information, see the GeoServer | Using GeoWebCache documentation.

Leveraging the integrated GeoWebCache could populate a new cache for a layer and possibly improve performance by reducing the number of map rendering calls for un-cached layers (internally, the GWC requests a larger map and subdivides it into 16 tiles [configurable]). Of course, pre-cached layers would benefit from this directly.