Support snapping to multiple ways at an input location (#5953)

This PR improves routing results by adding support for snapping to
multiple ways at input locations.

This means all edges at the snapped location can act as source/target
candidates for routing search, ensuring we always find the best route,
and not the one dependent on the edge selected.

src/engine/routing_algorithms/shortest_path.cpp

@@ -12,13 +12,13 @@ namespace routing_algorithms
 template InternalRouteResult
 shortestPathSearch(SearchEngineData<ch::Algorithm> &engine_working_data,
                    const DataFacade<ch::Algorithm> &facade,
-                   const std::vector<PhantomNodes> &phantom_nodes_vector,
+                   const std::vector<PhantomNodeCandidates> &waypoint_candidates,
                    const boost::optional<bool> continue_straight_at_waypoint);
 
 template InternalRouteResult
 shortestPathSearch(SearchEngineData<mld::Algorithm> &engine_working_data,
                    const DataFacade<mld::Algorithm> &facade,
-                   const std::vector<PhantomNodes> &phantom_nodes_vector,
+                   const std::vector<PhantomNodeCandidates> &waypoint_candidates,
                    const boost::optional<bool> continue_straight_at_waypoint);
 
 } // namespace routing_algorithms