Expand AI issue triage to gitlab-com

What does this MR do and why?

We need to triage and clear the issue backlog across all projects that are part of the product, which includes a dozen projects in gitlab-com

This MR expands the AI issue triage/label to cover gitlab-com

Expected impact & dry-runs

https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/11561132265

Action items

• If adding environment variables for reactive processors, update config/triage-web.yaml and .gitlab/ci/triage-web.yml
• (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