Publish subdivided datasource for global-eez-mr-v12

[twelch]

The flatgeobuf datasource for global-eez-mr-v12 currently is not subdivided. Some of the EEZ boundaries are so detailed now that land is included that running overlapFeatures takes a long time, notably for the defeault boundaryAreaOverlap gp function in template-ocean-eez

Subdividing

• It probably doesn't have to use the bundle-features command or even PostGIS.
• It could just be adding an OGR spatialite query to ST_Subdivide that maintains the properties
• Then publish that as a separate flatgeobuf datasource called global-eez-mr-v12-subdivided

Fetching

• After fetching the subdivided polygons using fgbFetchAll(url, bbox_of_sketch).
• It may be possible to use union-subdivided-polygons JS utility to stitch them back together, but it states that interior rings are not supported.