Log Generation / Observed generation.

While waiting for GatewayClass to be ready, log the Generation /
ObservedGeneration since it gives a useful signal on whether the
controller is stuck, or trying to converge forever.

conformance/utils/kubernetes/helpers.go

@@ -147,13 +147,14 @@ func ConditionsHaveLatestObservedGeneration(obj metav1.Object, conditions []meta
 		return nil
 	}
 
+	wantGeneration := obj.GetGeneration()
 	var b strings.Builder
-	fmt.Fprint(&b, "expected observedGeneration to be updated for all conditions")
+	fmt.Fprintf(&b, "expected observedGeneration to be updated to %d for all conditions", wantGeneration)
 	fmt.Fprintf(&b, ", only %d/%d were updated.", len(conditions)-len(staleConditions), len(conditions))
 	fmt.Fprintf(&b, " stale conditions are: ")
 
 	for i, c := range staleConditions {
-		fmt.Fprintf(&b, c.Type)
+		fmt.Fprintf(&b, "%s (got %d)", c.Type, c.ObservedGeneration)
 		if i != len(staleConditions)-1 {
 			fmt.Fprintf(&b, ", ")
 		}