Remove geoms from address results

As part of https://github.com/geoadmin/mf-chsdi3/issues/872

@procrastinatio We need to implement that for featuresearch and featureidentify.

I propose that we do the exact same thing that we did for `locations` and origin `address`.

We add x-varnished-authorized tag for those requests.

http://api3.geo.admin.ch/rest/services/ech/SearchServer?type=featuresearch&features=ch.bfs.gebaeude_wohnungs_register&searchText={ANY}
http://api3.geo.admin.ch/rest/services/ech/SearchServer?type=featureidentify&searchText=geb&features=ch.bfs.gebaeude_wohnungs_register&bbox={ANY}

I don't think we need `returnGeometry` parameter in featuresearch and featureidentify.
Is is doable?