Auto-close content issues created from contributors platform

Currently, when a user adds content on contributors.gitlab.com, a content issue is created (ex gitlab-community/community-members/content#6 (closed)). The content issue should be auto-closed after 14 days.

Details to work out before dev starts

What label can we use to indicate a content issue?

Implementation

Add new triage policy to https://gitlab.com/gitlab-community/meta/-/blob/main/.triage-policies.yml that auto-closes content issues after 14 days. See below for example of another triage policy that closes issues with certain labels

     - name: Close idle onboarding issues (after nudge)
        conditions:
          date:
            attribute: updated_at
            condition: older_than
            interval_type: days
            interval: 30
          state: opened
          labels:
            - automation:onboarding-nudged
          forbidden_labels:
            - automation:closed
        actions:
          comment: |
            Hi {{assignee}} it looks like this issue is idle so we're going to close it for now but if you're still interested in continuing your onboarding steps please reopen this issue or reach out here for assistance.

            Thanks!

            /close
            /label ~automation:closed