Use distro slug for windows packages

.github/workflows/test-packages-action-windows.yml

@@ -106,7 +106,7 @@ jobs:
 
   test:
     name: Test
-    runs-on: windows-latest
+    runs-on: ${{ inputs.distro-slug }}
     timeout-minutes: 120  # 2 Hours - More than this and something is wrong
     needs:
       - generate-matrix

tools/ci.py

@@ -1172,7 +1172,7 @@ def get_pr_test_labels(
                         f"The '{slug}' slug exists as a label but not as an available OS."
                     )
                 selected.add(slug)
-                if slug != "all":
+                if slug != "all" and slug in available:
                     available.remove(slug)
                 continue
             test_labels.append(name)