Add builder for distance_feature to QueryBuilders

The QueryBuilders convenience class is currently missing a shortcut to construct
a DistanceFeatureQueryBuilder, which is added here.

Closes elastic#47767

Author: Christoph Büscher

server/src/main/java/org/elasticsearch/index/query/QueryBuilders.java

@@ -25,6 +25,7 @@
 import org.elasticsearch.common.geo.ShapeRelation;
 import org.elasticsearch.common.geo.builders.ShapeBuilder;
 import org.elasticsearch.geometry.Geometry;
+import org.elasticsearch.index.query.DistanceFeatureQueryBuilder.Origin;
 import org.elasticsearch.index.query.MoreLikeThisQueryBuilder.Item;
 import org.elasticsearch.index.query.functionscore.FunctionScoreQueryBuilder;
 import org.elasticsearch.index.query.functionscore.ScoreFunctionBuilder;
@@ -100,6 +101,16 @@ public static DisMaxQueryBuilder disMaxQuery() {
         return new DisMaxQueryBuilder();
     }
 
+    /**
+     * A query to boost scores based on their proximity to the given origin for date, date_nanos and geo_point field types.
+     * @param name The field name
+     * @param origin The origin of the distance calculation. Can be a long, string or {@link GeoPoint}, depending on field type.
+     * @param pivot The distance from the origin at which relevance scores receive half of the boost value.
+     */
+    public static DistanceFeatureQueryBuilder distanceFeatureQuery(String name, Origin origin, String pivot) {
+        return new DistanceFeatureQueryBuilder(name, origin, pivot);
+    }
+
     /**
      * Constructs a query that will match only specific ids within all types.
      */