fix(avoidance): fix avoidance return dead point calculation logic for high curverture path

[satoshi-ota]

Description

🤖 Generated by Copilot at 84adaf6

Adjust the stop line distance for the avoidance path in avoidance_module.cpp. This prevents the vehicle from overshooting the stop line due to the shifted path curvature.

related ticket: https://tier4.atlassian.net/browse/RT1-4125

---

The avoidance module inserts a stop point in order not to pass through dead line to return original path. The return point is generated on original path, and the stop point is inserted on shifted path.

Therefore, it has to take the difference of distance between inner and outer path distance caused by high curverture into consideration. In this PR, it calculates the difference and set a stop point proper position.

Tests performed

simplescreenrecorder-2023-11-06_14.14.26.mp4

• PASS TIER IV INTERNAL SCENARIOS

Effects on system behavior

Improve avoidance maneuver.

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[shmpwk]

LGTM

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (e628971) 14.85% compared to head (84adaf6) 14.87%.
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5489      +/-   ##
==========================================
+ Coverage   14.85%   14.87%   +0.02%     
==========================================
  Files        1669     1670       +1     
  Lines      116318   117149     +831     
  Branches    36266    36869     +603     
==========================================
+ Hits        17277    17427     +150     
- Misses      79535    80078     +543     
- Partials    19506    19644     +138     

Flag	Coverage Δ		*Carryforward flag
differential	12.14% <0.00%> (?)
total	14.85% <ø> (+<0.01%)	⬆️	Carriedforward from e628971

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

Files	Coverage Δ
...er/src/scene_module/avoidance/avoidance_module.cpp	12.13% <0.00%> (-0.03%)	⬇️

... and 3 files with indirect coverage changes

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