fix(ekf_localizer): remove unnecessary publishers

[kminoda]

Description

Remove unnecessary debug publishers that makes the code difficult to read.

Tests performed

Build succeeds

Effects on system behavior

Two debug topics from EKF will no longer be published. Since these two topics are barely used, we see no negative impact on Autoware users.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fdd671f) 14.73% compared to head (bf49aac) 14.84%.
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5423      +/-   ##
==========================================
+ Coverage   14.73%   14.84%   +0.11%     
==========================================
  Files        1661     1662       +1     
  Lines      115531   113836    -1695     
  Branches    35675    34879     -796     
==========================================
- Hits        17023    16903     -120     
+ Misses      79272    77900    -1372     
+ Partials    19236    19033     -203     

Flag	Coverage Δ		*Carryforward flag
differential	28.67% <ø> (?)
total	14.84% <ø> (+0.11%)	⬆️	Carriedforward from 910f30b

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

Files	Coverage Δ
...king/include/autonomous_emergency_braking/node.hpp	0.00% <ø> (ø)
control/autonomous_emergency_braking/src/node.cpp	0.00% <ø> (ø)
..._localizer/include/ekf_localizer/ekf_localizer.hpp	0.00% <ø> (ø)
localization/ekf_localizer/src/ekf_localizer.cpp	0.00% <ø> (ø)
...ased_localizer/src/ar_tag_based_localizer_core.cpp	0.00% <ø> (ø)
.../scene_module/goal_planner/goal_planner_module.hpp	0.00% <ø> (-28.31%)	⬇️
...r_path_planner/scene_module/lane_change/normal.hpp	0.00% <ø> (-50.00%)	⬇️
..._planner/utils/goal_planner/goal_searcher_base.hpp	20.00% <ø> (ø)
.../scene_module/goal_planner/goal_planner_module.cpp	5.98% <ø> (+0.71%)	⬆️
...th_planner/src/scene_module/lane_change/normal.cpp	4.45% <ø> (+0.59%)	⬆️
... and 2 more

... and 95 files with indirect coverage changes

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[Motsu-san]