fix(autoware_freespace_planning_algorithms): fix shadowVariable

[kobayu858]

Description

This is a fix based on cppcheck shadowVariable warnings

planning/autoware_freespace_planning_algorithms/src/astar_search.cpp:308:37: style: Local variable 'pose' shadows outer variable [shadowVariable]
    geometry_msgs::msg::PoseStamped pose;
                                    ^

planning/autoware_freespace_planning_algorithms/src/astar_search.cpp:313:21: style: Local variable 'pw' shadows outer variable [shadowVariable]
    PlannerWaypoint pw;
                    ^

planning/autoware_freespace_planning_algorithms/src/rrtstar_core.cpp:186:19: style: Local variable 'node_best_parent' shadows outer variable [shadowVariable]
    NodeSharedPtr node_best_parent;
                  ^

Related links

Parent Issue:

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How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.75%. Comparing base (6b9f164) to head (230a976).
Report is 46 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7949   +/-   ##
=======================================
  Coverage   28.75%   28.75%           
=======================================
  Files        1594     1600    +6     
  Lines      116894   116885    -9     
  Branches    50048    50048           
=======================================
  Hits        33615    33615           
- Misses      74154    74172   +18     
+ Partials     9125     9098   -27     

Flag	Coverage Δ		*Carryforward flag
differential	15.42% <100.00%> (?)
total	28.76% <ø> (+<0.01%)	⬆️	Carriedforward from 8bf0622

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[kobayu858]

@kosuke55 @TakaHoribe @takayuki5168

Please confirm the PR. Thank you very much.

[kobayu858]

Thanks for the merge.