refactor(intersection): improve generate stopline functions

[soblin]

Description

Refactored improved the performance of getFirstPointInsidePolygons(), gererateStuckStopLine(), generateStopLine() by caching the polygons that the path intersects first from 1ms to 0.1ms.

Tests performed

CI: https://evaluation.tier4.jp/evaluation/reports/8708fada-ed90-5b81-b6f7-cc4e4ea4e5ac?project_id=prd_jt

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[codecov]

Codecov Report

Base: 11.79% // Head: 11.78% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (4d3ca76) compared to base (3f07107).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2918      +/-   ##
==========================================
- Coverage   11.79%   11.78%   -0.01%     
==========================================
  Files        1322     1322              
  Lines       92816    92829      +13     
  Branches    25011    25019       +8     
==========================================
  Hits        10944    10944              
- Misses      70398    70410      +12     
- Partials    11474    11475       +1     

Flag	Coverage Δ		*Carryforward flag
differential	3.91% <0.00%> (?)
total	11.79% <ø> (+<0.01%)	⬆️	Carriedforward from 3f07107

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

Impacted Files	Coverage Δ
...c/scene_module/intersection/scene_intersection.cpp	0.00% <0.00%> (ø)
...ule/intersection/scene_merge_from_private_road.cpp	0.00% <0.00%> (ø)
...ity_planner/src/scene_module/intersection/util.cpp	0.00% <0.00%> (ø)

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[soblin]

@takayuki5168 can you approve this refactoring (+ a minor performance update) ?