refactor(lane_change): separate structs to different folders

[zulfaqar-azmi-t4]

Description

Move utils/**_structs.hpp to structs\**.hpp
Move utils/parameters.hpp to structs\parameters.hpp
Move utils/base_class.hpp to base_class.hpp

Related links

Parent Issue:

• None

How was this PR tested?

Build Autoware.

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 29.56%. Comparing base (3cfb03e) to head (174d103).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
...are_behavior_path_lane_change_module/src/scene.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9625      +/-   ##
==========================================
+ Coverage   29.54%   29.56%   +0.01%     
==========================================
  Files        1443     1449       +6     
  Lines      108489   108633     +144     
  Branches    41391    41428      +37     
==========================================
+ Hits        32055    32117      +62     
- Misses      73323    73393      +70     
- Partials     3111     3123      +12     

Flag	Coverage Δ		*Carryforward flag
differential	22.16% <0.00%> (?)
total	29.54% <ø> (+<0.01%)	⬆️	Carriedforward from 3cfb03e

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