test(no_stopping_area): refactor and add tests

[maxime-clem]

Description

Related links

Parent Issue:

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How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 73.04348% with 31 lines in your changes missing coverage. Please review.

Project coverage is 26.28%. Comparing base (5b8219e) to head (32aa3ed).
Report is 16 commits behind head on main.

Files with missing lines	Patch %	Lines
...topping_area_module/src/scene_no_stopping_area.cpp	0.00%	17 Missing ⚠️
...ior_velocity_no_stopping_area_module/src/utils.cpp	91.20%	0 Missing and 8 partials ⚠️
...ior_velocity_no_stopping_area_module/src/utils.hpp	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9009      +/-   ##
==========================================
+ Coverage   26.18%   26.28%   +0.10%     
==========================================
  Files        1298     1304       +6     
  Lines       96982    97034      +52     
  Branches    39196    39200       +4     
==========================================
+ Hits        25391    25510     +119     
+ Misses      69020    68943      -77     
- Partials     2571     2581      +10     

Flag	Coverage Δ		*Carryforward flag
differential	21.07% <73.04%> (?)
total	26.21% <ø> (+0.02%)	⬆️	Carriedforward from 9d03cf3

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