refactor(start/goal_planner): use combineLanelets

[kosuke55]

Description

use combineLanelets for similar proccesing.

Tests performed

https://evaluation.tier4.jp/evaluation/reports/7c5294ef-2b39-58e7-8c87-eb32d83ca475?project_id=prd_jt

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.04% ⚠️

Comparison is base (30ec8f7) 15.17% compared to head (fd46f99) 15.13%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4894      +/-   ##
==========================================
- Coverage   15.17%   15.13%   -0.04%     
==========================================
  Files        1578     1578              
  Lines      108584   108859     +275     
  Branches    33374    33593     +219     
==========================================
+ Hits        16475    16479       +4     
- Misses      74193    74291      +98     
- Partials    17916    18089     +173     

Flag	Coverage Δ		*Carryforward flag
differential	12.80% <0.00%> (?)
total	15.17% <ø> (+<0.01%)	⬆️	Carriedforward from 30ec8f7

*This pull request uses carry forward flags. Click here to find out more.

Files Changed	Coverage Δ
...ion/ndt_scan_matcher/src/ndt_scan_matcher_core.cpp	0.00% <ø> (ø)
.../scene_module/goal_planner/goal_planner_module.hpp	6.66% <0.00%> (-2.43%)	⬇️
...cene_module/start_planner/start_planner_module.hpp	0.00% <ø> (ø)
.../scene_module/goal_planner/goal_planner_module.cpp	5.49% <0.00%> (-0.43%)	⬇️
..._planner/src/scene_module/goal_planner/manager.cpp	5.73% <0.00%> (-3.18%)	⬇️
...planner/src/scene_module/start_planner/manager.cpp	4.93% <0.00%> (-2.43%)	⬇️
...cene_module/start_planner/start_planner_module.cpp	4.77% <0.00%> (-0.63%)	⬇️
...ner/src/utils/goal_planner/geometric_pull_over.cpp	20.83% <0.00%> (+0.83%)	⬆️
...nner/src/utils/start_goal_planner_common/utils.cpp	0.00% <0.00%> (ø)
...ner/src/utils/start_planner/geometric_pull_out.cpp	8.33% <ø> (+1.01%)	⬆️

... and 1 file with indirect coverage changes

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[kyoichi-sugahara]

LGTM!