Auto-Update integration branches

[MaxSchaefer]

Describe the chore

The goal is to develop a GitHub Action Workflow to update integration/... branches from main via a pull request.

• If main is ahead of integration/..., create a update-integration/... branch and open a pull request
• If all checks of the the pull request are green, proceed to auto-merge
• If a check is red or a merge conflict occurs, assign codeowners to the pull request. Manual intervention is required