fix(autoware_behavior_path_planner_common): fix containerOutOfBounds warning

[veqcc]

Description

This is a fix based on cppcheck containerOutOfBounds error

planning/behavior_path_planner/autoware_behavior_path_planner_common/src/utils/path_utils.cpp:481:39: error: Out of bounds access in expression 'base_s.back()' because 'base_s' is empty. [containerOutOfBounds]
  for (double s = eps; s < base_s.back() - eps; s += resample_interval) {
                                      ^
planning/behavior_path_planner/autoware_behavior_path_planner_common/src/utils/path_utils.cpp:494:41: error: Out of bounds access in expression 'base_s.back()' because 'base_s' is empty. [containerOutOfBounds]
      end_pose, start_pose, (base_s.back() - new_s.at(i)) / base_s.back());
                                        ^

You know this is a false positive in cppcheck.
This PR is just to avoid cppcheck warnings.

Related links

Parent Issue:

• Link

How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[codecov]

Codecov Report

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

Project coverage is 13.34%. Comparing base (507e3f4) to head (d819400).
Report is 133 commits behind head on main.

Files	Patch %	Lines
...avior_path_planner_common/src/utils/path_utils.cpp	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7675      +/-   ##
==========================================
- Coverage   14.84%   13.34%   -1.51%     
==========================================
  Files        1999      525    -1474     
  Lines      139163    49053   -90110     
  Branches    43716    11897   -31819     
==========================================
- Hits        20661     6545   -14116     
+ Misses      95731    41550   -54181     
+ Partials    22771      958   -21813     

Flag	Coverage Δ
differential	13.34% <0.00%> (?)
total	?

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