add test for the registered feature gates

hack/verify-test-featuregates.sh

@@ -53,4 +53,19 @@ if [[ -n "${missing_defers}" ]]; then
   rc=1
 fi
 
+
+# ensure all generic features are added in alphabetic order
+lines=$(git grep 'genericfeatures[.].*:' -- pkg/features/kube_features.go)
+sorted_lines=$(echo "$lines" | sort -f)
+if [[ "$lines" != "$sorted_lines" ]]; then
+  echo "Generic features in pkg/features/kube_features.go not sorted" >&2
+  echo >&2
+  echo "Expected:" >&2
+  echo "$sorted_lines" >&2
+  echo >&2
+  echo "Got:" >&2
+  echo "$lines" >&2
+  rc=1
+fi
+
 exit $rc