fix(anta.tests): Correct inputs to outputs mapping for BGP tests

[gmuloc]

Description

Rollback some modifications because commands are not created in the same order than the inputs.

Fixes #669

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have run pre-commit for code linting and typing (pre-commit run)
• [x] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes (tox -e testenv)