refactor(workflows): replace sync labels job with reusable workflow call

Signed-off-by: Nikolai Emil Damm <neq@energinet.dk>

Author: Nikolai Emil Damm

.github/workflows/sync-labels.yaml

@@ -4,17 +4,6 @@ on:
     - cron: "0 7 * * 1"
   workflow_dispatch:
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
-  sync:
-    name: Run EndBug/label-sync
-    runs-on: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v4
-      - uses: EndBug/label-sync@v2
-        with:
-          config-file: "https://raw.githubusercontent.com/devantler/.github/refs/heads/main/.github/labels.yaml"
-          delete-other-labels: true
+  call-sync-labels-workflow:
+    uses: devantler-tech/.github/.github/workflows/sync-labels.yaml@main