Apply automation:bot-authored label to MRs authored by bots

What does this MR do and why?

Describe in detail what your merge request does and why.

Applies the automation:bot-authored label to all bot authored MRs under gitlab-org

Expected impact & dry-runs

These are strongly recommended to assist reviewers and reduce the time to merge your change.

Dry run: https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/1977546947

Applies a label to 104 MRs

Action items

• (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Engineering week-in-review

Relates to #849 (closed)