feat(motion_velocity_smoother): add guard before interpolation

[purewater0901]

Description

Add guards before the linear interpolation.

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[takayuki5168]

LGTM
Please wait for the scenario test

[codecov]

Codecov Report

Merging #1752 (0dc5062) into main (9944a2a) will decrease coverage by 0.05%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1752      +/-   ##
==========================================
- Coverage   10.31%   10.25%   -0.06%     
==========================================
  Files        1207     1204       -3     
  Lines       87119    87096      -23     
  Branches    20076    20096      +20     
==========================================
- Hits         8982     8931      -51     
- Misses      68835    68868      +33     
+ Partials     9302     9297       -5     

Flag	Coverage Δ		*Carryforward flag
differential	3.85% <0.00%> (?)
total	10.24% <0.00%> (-0.06%)	⬇️	Carriedforward from 24f4bf1

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
...k_constrained_smoother/velocity_planning_utils.cpp	0.00% <0.00%> (ø)
.../motion_velocity_smoother/src/trajectory_utils.cpp	3.07% <0.00%> (-0.35%)	⬇️
...ocalization_initialization_state__type_support.cpp	0.00% <0.00%> (-50.00%)	⬇️
...ocalization_initialization_state__type_support.cpp	0.00% <0.00%> (-22.06%)	⬇️
...msgs/srv/initialize_localization__type_support.cpp	0.00% <0.00%> (-20.00%)	⬇️
...fastrtps/initialize_localization__type_support.cpp	2.81% <0.00%> (-19.02%)	⬇️
...ocalization_initialization_state__type_support.cpp	0.00% <0.00%> (-15.39%)	⬇️
...er/src/scene_module/avoidance/avoidance_module.cpp	0.00% <0.00%> (ø)
...rc/scene_module/lane_change/lane_change_module.cpp	0.00% <0.00%> (ø)
... and 8 more

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[purewater0901]

Merge