refactor(obstacle_stop_planner): boost::optional/variant to std

[zulfaqar-azmi-t4]

Description

🤖[deprecated] Generated by Copilot at 480c3db

The code refactored the obstacle_stop_planner to use C++17 features and reduce dependency on boost. It replaced boost::optional and boost::variant with std::optional and std::variant in planner_utils.hpp and planner_utils.cpp, and updated the usage of optional values in node.cpp.

#5732

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (765a596) 15.32% compared to head (480c3db) 8.78%.
Report is 124 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #5743       +/-   ##
==========================================
- Coverage   15.32%   8.78%    -6.55%     
==========================================
  Files        1721       7     -1714     
  Lines      118559    1719   -116840     
  Branches    37995     918    -37077     
==========================================
- Hits        18169     151    -18018     
+ Misses      79657    1286    -78371     
+ Partials    20733     282    -20451     

Flag	Coverage Δ
differential	8.78% <ø> (?)
total	?

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