Add job provider for locale de_AT

[ChristinaRau]

• Faker version: 30.8.1
• OS: Ubuntu 22.04

The locale de_AT doesn't have a "job" provider. I would like to create this provider and also add the additional methods "job_female" and "job_male" because in German words are gendered depending on the person, i.e. a female person's job title sounds different than a male person's.

Steps to reproduce

1. initialize faker with de_AT
2. call fake.job()
3. you get an English job because there is no job provider for de_AT

Pull request: #2129