refactor(lane_change): revert "remove std::optional from lanes polygon"

[youtalk]

Reverts #9267

It seems that due to the changes in #9267, the autoware_behavior_path_lane_change_module is causing build errors, which has broken autoware.universe.
@zulfaqar-azmi-t4 Please address this issue. In the meantime, I have created this revert PR.

https://github.com/autowarefoundation/autoware.universe/actions/runs/11739742637/job/32704854017#step:13:30725

/__w/autoware.universe/autoware.universe/planning/behavior_path_planner/autoware_behavior_path_lane_change_module/src/utils/utils.cpp: In lambda function:
/__w/autoware.universe/autoware.universe/planning/behavior_path_planner/autoware_behavior_path_lane_change_module/src/utils/utils.cpp:1315:88: error: 'class lanelet::BasicPolygon2d' has no member named 'value'
 1315 |     return !boost::geometry::disjoint(path, common_data_ptr->lanes_polygon_ptr->target.value());
      |                                                                                        ^~~~~
/__w/autoware.universe/autoware.universe/planning/behavior_path_planner/autoware_behavior_path_lane_change_module/src/utils/utils.cpp: In lambda function:
/__w/autoware.universe/autoware.universe/planning/behavior_path_planner/autoware_behavior_path_lane_change_module/src/utils/utils.cpp:1322:79: error: 'class lanelet::BasicPolygon2d' has no member named 'value'
 1322 |           object.initial_polygon, common_data_ptr->lanes_polygon_ptr->current.value())) {
      |                                                                               ^~~~~

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[codecov]

Codecov Report

Attention: Patch coverage is 43.75000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 29.22%. Comparing base (b6118ac) to head (e6664bd).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...are_behavior_path_lane_change_module/src/scene.cpp	0.00%	5 Missing ⚠️
...havior_path_lane_change_module/src/utils/utils.cpp	63.63%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9272      +/-   ##
==========================================
- Coverage   29.23%   29.22%   -0.01%     
==========================================
  Files        1336     1337       +1     
  Lines      102981   103006      +25     
  Branches    39955    39951       -4     
==========================================
+ Hits        30105    30107       +2     
- Misses      69791    69815      +24     
+ Partials     3085     3084       -1     

Flag	Coverage Δ		*Carryforward flag
differential	20.08% <43.75%> (?)
total	29.23% <43.75%> (+<0.01%)	⬆️	Carriedforward from b6118ac

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