refactor(maps_utils): serve statics locally

district/templates/district/base.html

maps_utils/static/maps_utils/geo-feature-collection.js

...dor/leaflet.markercluster@1.5.3/leaflet.markercluster.css

.../leaflet.markercluster@1.5.3/leaflet.markercluster.js.map

.../leaflet.markercluster@1.5.3/leaflet.markercluster.min.js

...atic/maps_utils/vendor/leaflet@1.8.0/images/layers-2x.png

.../static/maps_utils/vendor/leaflet@1.8.0/images/layers.png

...maps_utils/vendor/leaflet@1.8.0/images/marker-icon-2x.png

...ic/maps_utils/vendor/leaflet@1.8.0/images/marker-icon.png

.../maps_utils/vendor/leaflet@1.8.0/images/marker-shadow.png

..._utils/static/maps_utils/vendor/leaflet@1.8.0/leaflet.css

...ils/static/maps_utils/vendor/leaflet@1.8.0/leaflet.js.map

...ils/static/maps_utils/vendor/leaflet@1.8.0/leaflet.min.js

...static/maps_utils/vendor/polylabel@1.0.2/polylabel.min.js

.../maps_utils/vendor/vue2-leaflet@2.7.1/vue2-leaflet.min.js

maps_utils/templates/maps_utils/includes/scripts.html

maps_utils/templates/maps_utils/includes/styles.html