Replace `["geometry-type"]` with `"$type"` (#1646)

Related to https://github.com/maplibre/maplibre-style-spec/pull/519 and https://github.com/maplibre/maplibre-gl-js/issues/3516

According to the Style Spec, `["geometry-type"]` is expected to distinguish between LineString and MultiLineString, while `"$type"` does not. For the transportation layer, the distinction is harmful.

All of OMT style layers, except these two, use `"$type"`.

layers/transportation/style.json

@@ -4529,9 +4529,7 @@
         "all",
         [
           "==",
-          [
-            "geometry-type"
-          ],
+          "$type",
           "LineString"
         ],
         [
@@ -4633,9 +4631,7 @@
         "all",
         [
           "==",
-          [
-            "geometry-type"
-          ],
+          "$type",
           "LineString"
         ],
         [
@@ -7834,4 +7830,4 @@
       "order": 183
     }
   ]
-}
+}