test(surround_obstacle_checker): add unit tests

[satoshi-ota]

Description

Related links

Parent Issue:

• Link

How was this PR tested?

• PASS COLCON TEST
• PASS TIER IV INTERNAL SCENARIOS

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 29.16667% with 17 lines in your changes missing coverage. Please review.

Project coverage is 26.61%. Comparing base (1e26395) to head (64a4631).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ng/autoware_surround_obstacle_checker/src/node.cpp	29.16%	17 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9039      +/-   ##
==========================================
+ Coverage   26.55%   26.61%   +0.05%     
==========================================
  Files        1296     1297       +1     
  Lines       95711    95713       +2     
  Branches    38983    39099     +116     
==========================================
+ Hits        25419    25474      +55     
+ Misses      67725    67671      -54     
- Partials     2567     2568       +1     

Flag	Coverage Δ		*Carryforward flag
differential	2.38% <29.16%> (?)
total	26.57% <ø> (+0.01%)	⬆️	Carriedforward from 98fcf17

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

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