refactor(goal_planner): remove reference_goal_pose getter/setter

[soblin]

Description

referance_goal_pose in GoalSearcher does not need to be saved as a state. So pass then in the caller side using GoalSearcher.

Related links

Parent Issue:

• Link

How was this PR tested?

• https://evaluation.tier4.jp/evaluation/reports/c515d86c-910d-55e8-86c7-74f2f74c2ce8?project_id=prd_jt
• https://evaluation.tier4.jp/evaluation/reports/e1c8650a-f0d7-57b1-a0f2-83b58e079f62?project_id=prd_jt

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

Thank you for contributing to the Autoware project!

🚧 If your pull request is in progress, switch it to draft mode.

Please ensure:

• You've checked our contribution guidelines.
• Your PR follows our pull request guidelines.
• All required CI checks pass before marking the PR ready for review.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 21 lines in your changes missing coverage. Please review.

Project coverage is 29.22%. Comparing base (4f29939) to head (1bd10db).
Report is 24 commits behind head on main.

Files with missing lines	Patch %	Lines
...ior_path_goal_planner_module/src/goal_searcher.cpp	0.00%	14 Missing ⚠️
...th_goal_planner_module/src/goal_planner_module.cpp	0.00%	6 Missing ⚠️
...or_path_goal_planner_module/goal_searcher_base.hpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9270      +/-   ##
==========================================
- Coverage   29.23%   29.22%   -0.02%     
==========================================
  Files        1335     1338       +3     
  Lines      102959   103018      +59     
  Branches    39947    39961      +14     
==========================================
  Hits        30102    30102              
- Misses      69898    70034     +136     
+ Partials     2959     2882      -77     

Flag	Coverage Δ		*Carryforward flag
differential	0.52% <0.00%> (?)
total	29.24% <ø> (+<0.01%)	⬆️	Carriedforward from 6d38b5f

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[kosuke55]

Suggested change

	auto goal_searcher = std::make_shared<GoalSearcher>(parameters, vehicle_footprint);
	const auto goal_searcher = std::make_shared<GoalSearcher>(parameters, vehicle_footprint);

?

[kosuke55]

Since it is now only used within planFreespacePath(), it may be ok to generate it within that function.

[kosuke55]

(update() does not depend on search(), and there is no problem if we pass goal candidates. It seems like it would be ok to make update() a static method.)