Add ddieulivol as a reviewer for the GitLab project

Why is this change being made?

From my onboarding:

New Team Member: Set a reminder to add yourself as a code reviewer for GitLab after working here for 3 months. You can do this by adding the appropriate entries to the team page entry file file with which you added yourself to the team page. Here's an example for frontend, and an example for backend. Doing reviews is a good way to help other team members, improve GitLab, and learn more about the code base. Because we use reviewer roulette once you add yourself as a reviewer, people will assign merge requests for you to review.

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added.
• Assign reviewers for this change to the correct DRI(s)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the "Maintained by" section in on the page being edited.
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies.
• If the changes affect team members, or warrant an announcement in another way, please consider posting an update in #whats-happening-at-gitlab linking to this MR.
  • If this is a change that directly impacts the majority of global team members, it should be a candidate for #company-fyi. Please work with internal communications and check the handbook for examples.

---