fix(multi_object_tracker): revert mot node implementation to composable node components

[technolojin]

Description

By the Autoware guide, exporting a standalone node executable without composition is discouraged.
https://autowarefoundation.github.io/autoware-documentation/main/contributing/coding-guidelines/ros-nodes/directory-structure/#exporting-a-composable-node-component-executables

This PR reverts the previous change #6780 of node implementation

Tests performed

1. Ran a logging replay simulator.
2. for glog

• find pid by ps -efH|grep multi_object_tracker
• manually terminate kill -15 <pid>

Effects on system behavior

Not applicable.

Interface changes

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[codecov]

Codecov Report

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

Project coverage is 15.75%. Comparing base (5145bb5) to head (50b312e).
Report is 15 commits behind head on main.

Files	Patch %	Lines
...i_object_tracker/src/multi_object_tracker_core.cpp	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7117      +/-   ##
==========================================
- Coverage   15.82%   15.75%   -0.07%     
==========================================
  Files        1900     1906       +6     
  Lines      132416   132885     +469     
  Branches    43848    43822      -26     
==========================================
- Hits        20953    20937      -16     
- Misses      88362    88870     +508     
+ Partials    23101    23078      -23     

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <0.00%> (?)
total	15.82% <ø> (+<0.01%)	⬆️	Carriedforward from 5145bb5

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

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[yukkysaito]

LGTM