Add posibility to allure_robotframework listener to send "broken" test status to allure

#### I'm submitting a ...
- [ ] feature request

#### What is the current behavior?
Currently allure_robotframework listener can send just four statuses to Allure - PASSED, FAILED, SKIPPED, UNKOWN (only in failure case), those are hardcoded in `get_allure_status` function.

#### What is the expected behavior?
Add possibility to send other test statuses, for example, BROKEN that actually in the default allure statuses list.

#### What is the motivation / use case for changing the behavior?
In my case we need to divide failed cases by different statuses on allure(failed for usual failures and broken for known cases with opened issues)

#### Please tell us about your environment:

allure-python-commons 2.13.2
allure-robotframework 2.13.2

Comienza con la función get_allure_status del listener de allure_robotframework, donde las asignaciones actuales PASSED, FAILED, SKIPPED y UNKNOWN se describen como codificadas de forma fija. Traza cómo llega a Allure el estado que devuelve y, a continuación, verifica que un fallo en un caso conocido pueda producir BROKEN mientras los estados existentes permanecen sin cambios.

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