[AI] Remove 'suspect ai generated' label and associated workflow (#7087)

* Initial plan

* [AI] Remove 'suspect ai generated' label and associated workflow

Co-authored-by: MatissJanis <886567+MatissJanis@users.noreply.github.com>

* [AI] Remove 'suspect ai generated' label from coderabbit config

Co-authored-by: MatissJanis <886567+MatissJanis@users.noreply.github.com>

* Add release notes for PR #7087

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: MatissJanis <886567+MatissJanis@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.github/workflows/pr-ai-label-cleanup.yml

@@ -1,25 +0,0 @@
-name: Remove 'suspect ai generated' label when 'AI generated' is present
-
-on:
-  pull_request_target:
-    types: [labeled]
-
-permissions:
-  pull-requests: write
-
-jobs:
-  remove-suspect-label:
-    if: >-
-      ${{ contains(github.event.pull_request.labels.*.name, 'AI generated') &&
-          contains(github.event.pull_request.labels.*.name, 'suspect ai generated') }}
-    runs-on: ubuntu-slim
-    steps:
-      - uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
-        with:
-          script: |
-            await github.rest.issues.removeLabel({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: context.issue.number,
-              name: 'suspect ai generated'
-            });