Remove thiagocsf from security produces MR report

What does this MR do and why?

Remove @thiagocsf from these reports: triage-reports#9115 (closed)

1. Container Scanning has moved back to groupcomposition analysis, so the groupsecurity policies doesn't have any projects in https://gitlab.com/gitlab-org/security-products/analyzers/
2. I am no longer an EM for groupsecurity policies

See https://gitlab.com/gitlab-com/Product/-/issues/4792.

Expected impact & dry-runs

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

See https://gitlab.com/gitlab-org/quality/triage-ops/-/tree/master/doc/scheduled#testing-with-a-dry-run on how to perform dry-runs.

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