fix(avoidance)!: remove stop reason

[satoshi-ota]

Description

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

Related links

Parent Issue:

• https://github.com/autowarefoundation/autoware.universe/pull/9344

How was this PR tested?

• [x] Psim
• [x] CI

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 29.78%. Comparing base (24652f8) to head (7319334). Report is 67 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #9364 +/- ## ========================================== - Coverage 29.78% 29.78% -0.01% ========================================== Files 1338 1341 +3 Lines 103302 103320 +18 Branches 40240 40240 ========================================== + Hits 30770 30775 +5 - Misses 69547 69562 +15 + Partials 2985 2983 -2 ``` | [Flag](https://app.codecov.io/gh/autowarefoundation/autoware.universe/pull/9364/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=autowarefoundation) | Coverage Δ | | *Carryforward flag | |---|---|---|---| | [differential](https://app.codecov.io/gh/autowarefoundation/autoware.universe/pull/9364/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=autowarefoundation) | `21.47% <ø> (?)` | | | | [total](https://app.codecov.io/gh/autowarefoundation/autoware.universe/pull/9364/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=autowarefoundation) | `29.78% <ø> (+<0.01%)` | :arrow_up: | Carriedforward from [24652f8](https://app.codecov.io/gh/autowarefoundation/autoware.universe/commit/24652f834f73b13b3e4465bfc9ab8335cbe6cdcf?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=autowarefoundation) | *This pull request uses carry forward flags. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=autowarefoundation) to find out more.

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