Sanity check if cloud-cleaner workflow is enabled

GitHub will automatically disable scheduled actions defined on
repositories which don't receive much activity. In particular such
scheduled jobs will be disabled after 60 days of repo inactivity.

This CI job sanity checks the current status and reports back to
every PR so we can manually re-enable cloud-cleaner if necessary.

.github/workflows/tests.yml

@@ -228,3 +228,19 @@ jobs:
         directory: processed-templates
         config: templates/.kube-linter-config.yml
         version: 0.3.0
+
+  cloud-cleaner-is-enabled:
+    name: "🧹 cloud-cleaner-is-enabled"
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check if workflow is enabled
+      run: |
+        curl https://github.com/osbuild/cloud-cleaner/actions/workflows/run_ib.yml 2>/dev/null | grep -vz "This scheduled workflow is disabled" >/dev/null
+
+    - name: How to enable cloud-cleaner
+      if: failure()
+      run: |
+        echo "Cloud-cleaner is disabled"
+        echo "Go to https://github.com/osbuild/cloud-cleaner/actions/workflows/run_ib.yml and"
+        echo "https://github.com/osbuild/cloud-cleaner/actions/workflows/run_cloudx.yml and"
+        echo "manually enable it!"