Replace dynamic distance calculation for table plugin with pre-calculated distances on shortcuts, avoiding unpacking cost.

Adds approx 10% to total data size.  Speeds up large table requests by 2 orders of magnitude.

Co-authored-by: Kajari Ghosh <ghoshkaj@gmail.com>

include/engine/routing_algorithms/many_to_many.hpp

@@ -25,15 +25,17 @@ struct NodeBucket
     unsigned from_clique_arc : 1;
     EdgeWeight weight;
     EdgeDuration duration;
+    EdgeDistance distance;
 
     NodeBucket(NodeID middle_node,
                NodeID parent_node,
                bool from_clique_arc,
                unsigned column_index,
                EdgeWeight weight,
-               EdgeDuration duration)
+               EdgeDuration duration,
+               EdgeDistance distance)
         : middle_node(middle_node), parent_node(parent_node), column_index(column_index),
-          from_clique_arc(from_clique_arc), weight(weight), duration(duration)
+          from_clique_arc(from_clique_arc), weight(weight), duration(duration), distance(distance)
     {
     }
 
@@ -41,9 +43,10 @@ struct NodeBucket
                NodeID parent_node,
                unsigned column_index,
                EdgeWeight weight,
-               EdgeDuration duration)
+               EdgeDuration duration,
+               EdgeDistance distance)
         : middle_node(middle_node), parent_node(parent_node), column_index(column_index),
-          from_clique_arc(false), weight(weight), duration(duration)
+          from_clique_arc(false), weight(weight), duration(duration), distance(distance)
     {
     }