no-op if SENTRY_DSN not defined

[nalbion]

Description

fix panic in integration tests

GitHub Issue Linking Docs

Checklist

• [x] I have added one of the patch, minor, major or no-release labels
• [ ] I have linked an issue from this repository using the Development option
• [ ] I have performed a self-review of my own code
• [ ] I have checked for redundant or commented out code
• [ ] I have commented my code where I can't make it self-documenting
• [ ] I have made corresponding changes to the documentation
• [ ] I have added any appropriate tests