Add danger review in CI

What does this MR do?

Enables danger-review in CI.

Requires:

• gitlab-com/www-gitlab-com!95662 (merged) to be merged
• DANGER_GITLAB_API_TOKEN CI/CD variables to be set with project access token named e.g. Danger bot.

Screenshot

From splattael/pipeline-common!1 (closed) with

With DANGER_GITLAB_API_TOKEN

📓 Maintainers will picked after gitlab-com/www-gitlab-com!95662 (merged) is merged. Now it contains useful information 🎉

Check-list

• [-] Verify the change in all affected pipelines.