Support attachments for behave-parallel

#### I'm submitting a ...
- [ ] bug report
- [x] feature request
- [ ] support request => Please do not submit support request here, see note at the top of this template.

#### What is the current behavior?
Behave parallel doesn't support attachment into enviroment.py (before step, after step ....)

#### What is the expected behavior?
Support use attachments (screenshot, file, log) for behave-parallel as well as at behave

#### What is the motivation / use case for changing the behavior?
consistency and better way for debugging

Comienza localizando la integración de behave-parallel y comparándola con el soporte existente de behave para attachments. Sigue cómo se gestionan los attachments de hooks de environment.py como before y after steps, y verifica después que las capturas de pantalla, los archivos y los logs aparezcan correctamente en los resultados de Allure generados para ejecuciones en paralelo.

Escrito por el modelo de indexación a partir del texto del issue.