Fix steering controllers library code documentation and naming (backport #1149)

[mergify]

A follow-up to #1118, using consistent nomenclature introduced in #954

My commits do not change any logic or behavior, just make the code more readable.

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This is an automatic backport of pull request #1149 done by Mergify.

[codecov]

Codecov Report

Attention: Patch coverage is 74.35897% with 20 lines in your changes missing coverage. Please review.

Project coverage is 86.92%. Comparing base (94149be) to head (576fafb).
Report is 1 commits behind head on iron.

Additional details and impacted files

@@            Coverage Diff             @@
##             iron    #1165      +/-   ##
==========================================
+ Coverage   86.67%   86.92%   +0.25%     
==========================================
  Files          86       86              
  Lines        7412     7401      -11     
  Branches      612      611       -1     
==========================================
+ Hits         6424     6433       +9     
+ Misses        759      740      -19     
+ Partials      229      228       -1     

Flag	Coverage Δ
unittests	86.92% <74.35%> (+0.25%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...g_controller/src/ackermann_steering_controller.cpp	80.00% <100.00%> (ø)
...steering_controllers_library/steering_odometry.hpp	100.00% <ø> (ø)
...ng_controller/src/tricycle_steering_controller.cpp	78.57% <100.00%> (ø)
...ing_controller/src/bicycle_steering_controller.cpp	75.00% <75.00%> (ø)
...ring_controllers_library/src/steering_odometry.cpp	73.79% <70.76%> (+4.76%)	⬆️

... and 3 files with indirect coverage changes