feat(behavior_path_planner): visualize pull over candidate path after approval

[kosuke55]

Description

visualize pull over candidate path after approval.

Related links

Tests performed

psim
(lane_departure doesn't work in shoulder_lane, so emergency is not a problem)

pull_over_candidate_path-2022-09-13_12.38.24.mp4

Notes for reviewers

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• I've confirmed the contribution guidelines.
• The PR follows the pull request guidelines.

In-review checklist for the PR reviewers

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• The PR follows the pull request guidelines.
• The PR has been properly tested.
• The PR has been reviewed by the code owners.

Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.
• The PR is ready for merge.

After all checkboxes are checked, anyone who has write access can merge the PR.

[codecov]

Codecov Report

Merging #1848 (c4d69cb) into main (e28c169) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1848      +/-   ##
==========================================
- Coverage   10.46%   10.44%   -0.02%     
==========================================
  Files        1221     1221              
  Lines       87619    87779     +160     
  Branches    20420    20529     +109     
==========================================
  Hits         9165     9165              
- Misses      68977    69118     +141     
- Partials     9477     9496      +19     

Flag	Coverage Δ		*Carryforward flag
differential	1.28% <0.00%> (?)
total	10.44% <0.00%> (ø)		Carriedforward from e28c169

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

Impacted Files	Coverage Δ
...lanner/scene_module/pull_over/pull_over_module.hpp	0.00% <ø> (ø)
...er/src/scene_module/pull_over/pull_over_module.cpp	0.00% <0.00%> (ø)

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[takayuki5168]

LGTM