fix(maps): avoid 404 on keyless Google tiles-token probe (#1066)

Return an uncached unavailable-token response for keyless Google tile-token requests.

Contribution by @dvilrgamerz.

src/maps/googleTokens.js

@@ -38,6 +38,7 @@ export function createGoogleTokenSource({
         headers: { Accept: 'application/json' },
         cache: 'no-store',
       });
+      if (response.status === 204) return null;
       if (!response.ok) {
         await response.body?.cancel();
         return null;