chore: use VersionRestoredEvent instead of deprecated rollback hook

[AIlkiv]

📝 Summary

Continuation of this PR #6918. In 31 (nextcloud/server#50990), I rewrote the rollback hook to VersionRestoredEvent. This PR removes the hook and adds a listener

🖼️ Screenshots

🏚️ Before	🏡 After
B	A

🚧 TODO

• ...

🏁 Checklist

• Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• Sign-off message is added to all commits
• Tests (unit, integration and/or end-to-end) passing and the changes are covered with tests
• Documentation (README or documentation) has been updated or is not required

[juliusknorr]

Thanks a lot for following up on that. CI has a small complaint about code style/psalm and autoloader, but otherwise 👍

Let me know if you need any help to get those resolved

[AIlkiv]

@juliusknorr fixed, please start the pipeline again

[github-actions]

Hello there,
Thank you so much for taking the time and effort to create a pull request to our Nextcloud project.

We hope that the review process is going smooth and is helpful for you. We want to ensure your pull request is reviewed to your satisfaction. If you have a moment, our community management team would very much appreciate your feedback on your experience with this PR review process.

Your feedback is valuable to us as we continuously strive to improve our community developer experience. Please take a moment to complete our short survey by clicking on the following link: https://cloud.nextcloud.com/apps/forms/s/i9Ago4EQRZ7TWxjfmeEpPkf6

Thank you for contributing to Nextcloud and we hope to hear from you soon!

(If you believe you should not receive this message, you can add yourself to the blocklist.)