feat: update grid size for ground segmentation

The grid size for ground segmentation has been updated from 0.1 to 0.5. This change improves the performance with the new grid data structure.

Signed-off-by: Taekjin LEE <[email protected]>

autoware_launch/config/perception/obstacle_segmentation/ground_segmentation/ground_segmentation.param.yaml

@@ -24,7 +24,7 @@
         use_virtual_ground_point: True
         split_height_distance: 0.2
         non_ground_height_threshold: 0.20
-        grid_size_m: 0.1
+        grid_size_m: 0.5
         grid_mode_switch_radius: 20.0
         gnd_grid_buffer_size: 4
         detection_range_z_max: 2.5