fix(autoware_pure_pursuit): fix redundantInitialization redundantInitialization

[veqcc]

Description

This is a fix based on cppcheck redundantInitialization and variableScope warnings

control/autoware_pure_pursuit/src/autoware_pure_pursuit/autoware_pure_pursuit_lateral_controller.cpp:455:24: style: Redundant initialization for 'lookahead_distance'. The initialized value is overwritten before it is read. [redundantInitialization]
    lookahead_distance = calcLookaheadDistance(
                       ^
control/autoware_pure_pursuit/src/autoware_pure_pursuit/autoware_pure_pursuit_lateral_controller.cpp:453:29: note: lookahead_distance is initialized
  double lookahead_distance = min_lookahead_distance;
                            ^
control/autoware_pure_pursuit/src/autoware_pure_pursuit/autoware_pure_pursuit_lateral_controller.cpp:455:24: note: lookahead_distance is overwritten
    lookahead_distance = calcLookaheadDistance(
                       ^
control/autoware_pure_pursuit/src/autoware_pure_pursuit_core/interpolate.cpp:116:10: style: The scope of the variable 'tmp' can be reduced. [variableScope]
  double tmp;
         ^

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

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 29.24%. Comparing base (7fe1e36) to head (960fbc3).
Report is 65 commits behind head on main.

Files	Patch %	Lines
...rsuit/autoware_pure_pursuit_lateral_controller.cpp	0.00%	2 Missing ⚠️
...uit/src/autoware_pure_pursuit_core/interpolate.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8225      +/-   ##
==========================================
- Coverage   29.25%   29.24%   -0.01%     
==========================================
  Files        1600     1600              
  Lines      117736   117752      +16     
  Branches    50713    50716       +3     
==========================================
+ Hits        34438    34439       +1     
- Misses      74098    74112      +14     
- Partials     9200     9201       +1     

Flag	Coverage Δ		*Carryforward flag
differential	15.54% <0.00%> (?)
total	29.25% <ø> (+<0.01%)	⬆️	Carriedforward from ba5a81a

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