fix: fix road barrier conversion issue

Bug description: when handling road barrier, if the @s + @length value of the road barrier exceeds the length of the corresponding road, the map test will collapse due to invalid end point of the road barrier.

To fix it:

1. Add check condition for road barrier points conversion
2. Add corresponding test case for updated code
3. update README for known constrains

RoadLogicSuite/Internal/MapConversion/mantle_barrier_converter.cpp

@@ -40,13 +40,21 @@ std::unique_ptr<map_api::LaneBoundary> MantleBarrierConverter::Convert(const std
     }
     const auto position = converter
                               .ConvertRoadPositionToInertialCoordinates(
-                                  {.road = road_id, .s_offset = barrier.s_end, .t_offset = barrier.t_end})
-                              .value();
-    points.push_back({
-        .position = {position.x, position.y, position.z + barrier.z_offset_end},
+                                  {.road = road_id, .s_offset = barrier.s_end, .t_offset = barrier.t_end});
+    
+    if (position.has_value())
+    {
+        points.push_back({
+        .position = {position.value().x, position.value().y, position.value().z + barrier.z_offset_end},
         .width = barrier.width_end,
         .height = barrier.height_end,
-    });
+        });
+    }
+    else 
+    {
+        std::cout << "WARNING: Invalid s_end value of road barrier with road id "  << road_id << " is discarded in conversion!" << std::endl;
+    }
+
     if (config.downsampling)
     {
         points = DecimatePolyline(points.begin(), points.end(), config.downsampling_epsilon.value());