chore(ci): cat all issue labels workflows in issue-labels.yml

cat cascade-setup-end-to-end.yml backport.yml merge-requirements.yml release-notes-assistant.yml > issue-labels.yml
rm cascade-setup-end-to-end.yml backport.yml merge-requirements.yml release-notes-assistant.yml

.forgejo/workflows/backport.yml

@@ -1,44 +0,0 @@
-# Copyright 2024 The Forgejo Authors
-# SPDX-License-Identifier: MIT
-#
-name: issue-labels
-
-on:
-  pull_request_target:
-    types:
-      - closed
-      - labeled
-
-jobs:
-  backporting:
-    if: >
-      vars.ROLE == 'forgejo-coding' &&
-
-      secrets.BACKPORT_TOKEN != '' &&
-
-      github.event_name == 'pull_request_target' &&
-      (
-        github.event.pull_request.merged &&
-        contains(toJSON(github.event.pull_request.labels), 'backport/v')
-      )
-    runs-on: docker
-    container:
-      image: 'code.forgejo.org/oci/node:20-bookworm'
-    steps:
-      - name: Debug info
-        run: |
-          cat <<'EOF'
-          ${{ toJSON(github) }}
-          EOF
-      - uses: https://code.forgejo.org/actions/git-backporting@v4.8.4
-        with:
-          target-branch-pattern: "^backport/(?<target>(v.*))$"
-          strategy: ort
-          strategy-option: find-renames
-          cherry-pick-options: -x
-          auth: ${{ secrets.BACKPORT_TOKEN }}
-          pull-request: ${{ github.event.pull_request.url }}
-          auto-no-squash: true
-          enable-err-notification: true
-          git-user: forgejo-backport-action
-          git-email: forgejo-backport-action@noreply.codeberg.org