[openstreetmap/openstreetmap-website] "layeradd layerremove" event handlers dramatically slow down Map data layer rendering (Issue #5466)

[Roman Deev]

What if we add a layer type check to the handler for which the handler was triggered? Something like:
```js 
map.on("moveend layeradd layerremove", function (e) { 
   if (!L.TileLayer.prototype.isPrototypeOf(e?.layer)){
	  return
   }
   updateLinks( 
     map.getCenter().wrap(), 
     map.getZoom(), 
     map.getLayersCode(), 
     map._object); 
  
   Cookies.set("_osm_location", OSM.locationCookie(map), { secure: true, expires: expiry, path: "/", samesite: "lax" }); 
 }); 
```

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