[core][android][darwin] Fix GeoJSONOptions handling

- share the `GeoJSONOptions` instances using `Immutable<GeoJSONOptions>` - avoid extra copying
- fix wrapping of the `GeoJSONOptions` instances in supercluster map/reduce lambdas.
  Previously, local variables were wrapped by reference.

test/style/source.test.cpp

@@ -852,10 +852,8 @@ TEST(Source, RenderTileSetSourceUpdate) {
 TEST(Source, GeoJSONSourceTilesAfterDataReset) {
     SourceTest test;
     GeoJSONSource source("source");
-    auto geoJSONData = GeoJSONData::create(
-        mapbox::geojson::parse(
-            R"({"geometry": {"type": "Point", "coordinates": [1.1, 1.1]}, "type": "Feature", "properties": {}})"),
-        {});
+    auto geoJSONData = GeoJSONData::create(mapbox::geojson::parse(
+        R"({"geometry": {"type": "Point", "coordinates": [1.1, 1.1]}, "type": "Feature", "properties": {}})"));
     source.setGeoJSONData(geoJSONData);
     RenderGeoJSONSource renderSource{staticImmutableCast<GeoJSONSource::Impl>(source.baseImpl)};
 
@@ -879,4 +877,4 @@ TEST(Source, GeoJSONSourceTilesAfterDataReset) {
     static_cast<RenderSource&>(renderSource)
         .update(source.baseImpl, layers, true, true, test.tileParameters(MapMode::Static));
     EXPECT_TRUE(renderSource.isLoaded()); // Tiles are reset in static mode.
-}
+}