*.ctrace-run.yml: info:, warning:, error: can be list of strings

[jreineckearm]

Fixes

N/A

Changes

• *.ctrace-run.yml: Allows ctrace-ref:'s info:, warning:, error: to be either a string or a list of strings. The latter allows to collect for example multiple errors during resolution of a settings node in a structured way.

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

[JonatanAntoni]

LGTM