fix(tensorrt_yolox): add data_path arg and update default model path

[lexavtanke]

Description

Belongs to Standardize a strategy for packages with downloaded artifacts

This PR introduces new launch argument data_path in the form:
<arg name="data_path" default="$(env HOME)/autoware_data" description="packages data and artifacts directory path"/>

It also updates default model path and README.

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[miursh]

LGTM

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (7e9b4de) 14.85% compared to head (4d36450) 14.72%.
Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5119      +/-   ##
==========================================
- Coverage   14.85%   14.72%   -0.13%     
==========================================
  Files        1627     1633       +6     
  Lines      112674   113640     +966     
  Branches    34814    34814              
==========================================
  Hits        16739    16739              
- Misses      77171    78137     +966     
  Partials    18764    18764              

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <ø> (?)
total	14.85% <ø> (+<0.01%)	⬆️	Carriedforward from 7e9b4de

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

Files	Coverage Δ
...onitor/include/localization_error_monitor/node.hpp	0.00% <ø> (ø)
...calization/localization_error_monitor/src/node.cpp	0.00% <ø> (ø)
...cene_module/start_planner/start_planner_module.hpp	0.00% <ø> (ø)
...cene_module/start_planner/start_planner_module.cpp	5.31% <ø> (+0.01%)	⬆️

... and 6 files with indirect coverage changes

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[wep21]

LGTM