Add expanded grid to Terria and DEA Maps

[robbibt]

This PR adds a GeoJSON version of the updated/expanded Collection 3 grid to Terriacube and DEA Maps (see preview links below). It is located in Other > DEA Shapes.

To make it clear that the grid is not final and may change, I have included the following caveat:

This is a provisional layer intended to replace the existing DEA Summary Product Grid (Collection 3) by updating region code IDs to account for new satellite data processed over Australia's external territories.

[github-actions]

Terria Cube preview:
https://terria-cube.terria.io/#clean&https://raw.githubusercontent.com/GeoscienceAustralia/dea-config/expanded_grid/dev/terria/terria-cube-v8.json

DEA Maps preview:
https://maps.dea.ga.gov.au/#clean&https://raw.githubusercontent.com/GeoscienceAustralia/dea-config/expanded_grid/prod/terria/dea-maps-v8.json

[gumpgourou]

Maybe add "....to replace during 2024 the.... "?