fix: attempted to address non freed memory

[knzo25]

Description

This PR addressed the large amounts of memory used by the lidar-lidar calibrator.
This is in part due to not freeing some memory until the the program finishes (exits), some PCL magic, and freeing some results before. However, some memory is still not being freed correctly, but fixing that would require PCL modifications that are currently outside of scope.

Related links

Tests performed

• Calibrated the X2 gen2 vehicle with the sugeested route and profile.
• Before this PR: 38.6GB of RAM used at the end of the calibration
• With this PR: 9GB

Notes for reviewers

To review this PR, it needs to be checked that calibration still works (any data is fine) and that the consumed memory decreases (at the end of the calibration)

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 97 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (bab5400) to head (5486e50).
Report is 23 commits behind head on tier4/universe.

Files with missing lines	Patch %	Lines
..._based_calibrator/src/mapping_based_calibrator.cpp	0.00%	48 Missing ⚠️
.../mapping_based_calibrator/src/lidar_calibrator.cpp	0.00%	42 Missing ⚠️
calibrators/mapping_based_calibrator/src/utils.cpp	0.00%	7 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           tier4/universe    #206      +/-   ##
=================================================
- Coverage            0.93%   0.00%   -0.94%     
=================================================
  Files                 270      28     -242     
  Lines               21339    2653   -18686     
  Branches              383     223     -160     
=================================================
- Hits                  200       0     -200     
+ Misses              20982    2653   -18329     
+ Partials              157       0     -157     

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

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[muraki-t4]

LGTM！

[knzo25]

Merging as @muraki-t4 performed an independent confirmation