refactor(lane_change): move isLaneChangePathSafe to normal lane change class

[purewater0901]

Description

Move the isLaneChangePathSafe function to the normal lane change class to clean the code

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

Patch coverage: 1.01% and project coverage change: -0.01 ⚠️

Comparison is base (0752672) 15.21% compared to head (583199e) 15.21%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4260      +/-   ##
==========================================
- Coverage   15.21%   15.21%   -0.01%     
==========================================
  Files        1489     1489              
  Lines      102610   102643      +33     
  Branches    31518    31523       +5     
==========================================
+ Hits        15613    15615       +2     
- Misses      70046    70077      +31     
  Partials    16951    16951              

Flag	Coverage Δ		*Carryforward flag
differential	13.63% <1.01%> (?)
total	15.22% <ø> (+0.01%)	⬆️	Carriedforward from 0752672

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

Impacted Files	Coverage Δ
...r_path_planner/scene_module/lane_change/normal.hpp	0.00% <ø> (ø)
...r_path_planner/utils/path_shifter/path_shifter.hpp	0.00% <ø> (ø)
...th_planner/src/scene_module/lane_change/normal.cpp	5.18% <0.00%> (-0.45%)	⬇️
...avior_path_planner/src/utils/lane_change/utils.cpp	0.37% <ø> (+0.02%)	⬆️
...th_planner/src/utils/path_shifter/path_shifter.cpp	6.71% <0.00%> (-0.08%)	⬇️
...er/src/scene_module/avoidance/avoidance_module.cpp	11.66% <2.00%> (-0.06%)	⬇️

... and 1 file with indirect coverage changes

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[zulfaqar-azmi-t4]

LGTM!