As a developer, I want to confidently merge doc only PRs without overwriting branch protection restrictions.

Current Situation:

• Documentation changes do not trigger our CI
• We expect our CI to pass before merging PRs
• So doc only PRs are never "cleanly" mergable atm
• They need admin writes to overwrite restrictions for merging

Goal:

• Adjust the CI so that doc PRs are mergable without admin rights and without overwriting restrictions
• At the same time, do not run the full 30min CI for just a doc change

Acceptance Criteria:

• doc only changes can be merged without overwriting restrictions

[optional] Notes:

• possibly related: T378943: [WBS Doc] WBS Documentation
• possibly related: T378935: Try rulesets and apply SSH Deploy Key for Release workflow

[optional] Open Questions: