fix(autoware_universe_utils): fix constVariableReference

[kobayu858]

Description

This is a fix based on cppcheck constVariableReference warnings

common/object_recognition_utils/src/conversion.cpp:49:15: style: Variable 'tracked_object' can be declared as reference to const [constVariableReference]
  for (auto & tracked_object : tracked_objects.objects) {
              ^

common/object_recognition_utils/src/conversion.cpp:77:15: style: Variable 'detected_object' can be declared as reference to const [constVariableReference]
  for (auto & detected_object : detected_objects.objects) {
              ^

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 2 lines in your changes missing coverage. Please review.

Project coverage is 27.71%. Comparing base (106625a) to head (72b5272).
Report is 5 commits behind head on main.

Files	Patch %	Lines
common/object_recognition_utils/src/conversion.cpp	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7883      +/-   ##
==========================================
- Coverage   28.95%   27.71%   -1.24%     
==========================================
  Files        1606     1658      +52     
  Lines      117598   119834    +2236     
  Branches    50597    50162     -435     
==========================================
- Hits        34046    33210     -836     
- Misses      74299    77609    +3310     
+ Partials     9253     9015     -238     

Flag	Coverage Δ		*Carryforward flag
differential	18.30% <0.00%> (?)
total	28.40% <ø> (-0.55%)	⬇️	Carriedforward from 3063a7c

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[kobayu858]

@scepter914 @miursh @takayuki5168 @YoshiRi

Please confirm the PR. Thank you very much.

[takayuki5168]

Thank you!