Use runner-os consistently in integ-tests

.github/workflows/integ-test-caching-config.yml

@@ -100,7 +100,7 @@ jobs:
 
   # Test that build scans are captured when caching is disabled because Gradle User Home already exists
   cache-disabled-pre-existing-gradle-home:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest # This test only runs on Ubuntu
     steps:
     - name: Checkout sources
       uses: actions/checkout@v4