docs: 📚 remove all descriptions from screenshot tests

[mariohamann]

Description

Coming from @Vahid1919 over here #1252 (comment) we should think about removing all descriptions for the screenshots, as they now will appear nowhere.

Blocked by #1142

Where to remove the documentation

Everywhere.

DoR

• Item has business value
• Item has been estimated by the team
• Item is clear and well-defined
• Item dependencies have been identified

DoD

• Documentation has been created/updated (if applicable)
• Migration Guide has been created/updated (if applicable)
• Relevant stories (Features, A11y) are created/updated
• Implementation works successfully on feature branch