fix(bpp)!: remove stop reason

[satoshi-ota]

Description

Don't use stop reason. This module uses velocity factor instead of it.

Related links

Parent Issue:

• Link

How was this PR tested?

Please confirm that this module doesn't output stop reason.

/planning/scenario_planning/status/stop_reasons

• PASS TIER IV INTERNAL SCENARIOS

Notes for reviewers

After this PR, this module only outputs velocity/steering factors.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

Thank you for contributing to the Autoware project!

🚧 If your pull request is in progress, switch it to draft mode.

Please ensure:

• You've checked our contribution guidelines.
• Your PR follows our pull request guidelines.
• All required CI checks pass before marking the PR ready for review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.04%. Comparing base (badf8ca) to head (636cfaa).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9449      +/-   ##
==========================================
- Coverage   29.06%   29.04%   -0.02%     
==========================================
  Files        1438     1444       +6     
  Lines      108434   108457      +23     
  Branches    41516    41507       -9     
==========================================
- Hits        31515    31504      -11     
- Misses      73879    73913      +34     
  Partials     3040     3040              

Flag	Coverage Δ		*Carryforward flag
differential	20.02% <ø> (?)
total	29.05% <ø> (-0.01%)	⬇️	Carriedforward from badf8ca

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests