#809 Vault sidecar challenge2

[commjoen]

What kind of changes does this PR include?

• Fixes or refactors : fixes missing annotations in docs for challenge46
• A new challenge: adds last vault based challenge
• Additional documentation: fixes missing annotations in docs for challenge46
• Something else

Description

Creates challenge 47 with vault injection debugging issues and updates challenge 46 with the right content, including for cloud-envs.

Relations

Closes #809

Checklist:

TODOS:

• Fix challenge46: make sure that the printfs are being called
• Fix challenge46: update texts
• Fix challenge47: update texts
• Fix challenge46/47 k8s annotations for cloud envs
• All the contributions made are solely the work of me and my co-authors
• I tested the changes in this PR (if applicable)
• I added unit tests to ensure my change works (when change in Java or on front-end code)
• I added UI tests to ensure my UI changes work (when change in the overall UI, not needed if just adding a challenge)
• The PR passes pre-commit hooks and automated tests