fix: Avoid querying PIP service for non-coarse reverse

Queries that specified only non-corase layers (address or venue) and had
no results returned from Elasticsearch would trigger a request to the
PIP service.

The PIP service does not contain any addresses or venues so this query
will never return anything, and only waste time.

routes/v1.js

@@ -138,7 +138,7 @@ function addRoutes(app, peliasConfig) {
 
   // fallback to coarse reverse when regular reverse didn't return anything
   const coarseReverseShouldExecute = all(
-    isPipServiceEnabled, not(hasRequestErrors), not(hasResponseData)
+    isPipServiceEnabled, not(hasRequestErrors), not(hasResponseData), not(isOnlyNonAdminLayers)
   );
 
   const libpostalShouldExecute = all(