AWS_CE_COST_CATEGORY: be able to use nested operands like you can via aws api

.changelog/30862.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+resource/aws_ce_cost_category: Allow up to 3 levels of `and`, not` and `or` operand nesting for the `rule` argument
+```

internal/service/ce/anomaly_subscription.go

@@ -96,7 +96,7 @@
 				MaxItems: 1,
 				Computed: true,
 				Optional: true,
-				Elem:     elemExpression(),
+				Elem:     expressionElem(2),
 			},
 		},
 
@@ -124,7 +124,7 @@
 	}
 
 	if v, ok := d.GetOk("threshold_expression"); ok {
-		input.AnomalySubscription.ThresholdExpression = expandCostExpression(v.([]interface{})[0].(map[string]interface{}))
+		input.AnomalySubscription.ThresholdExpression = expandExpression(v.([]interface{})[0].(map[string]interface{}))
 	}
 
 	output, err := conn.CreateAnomalySubscription(ctx, input)
@@ -160,7 +160,7 @@
 	d.Set("monitor_arn_list", subscription.MonitorArnList)
 	d.Set("name", subscription.SubscriptionName)
 	d.Set("subscriber", flattenSubscribers(subscription.Subscribers))
-	if err := d.Set("threshold_expression", []interface{}{flattenCostCategoryRuleExpression(subscription.ThresholdExpression)}); err != nil {
+	if err := d.Set("threshold_expression", []interface{}{flattenExpression(subscription.ThresholdExpression)}); err != nil {
 		return sdkdiag.AppendErrorf(diags, "setting threshold_expression: %s", err)
 	}
 
@@ -190,7 +190,7 @@
 		}
 
 		if d.HasChange("threshold_expression") {
-			input.ThresholdExpression = expandCostExpression(d.Get("threshold_expression").([]interface{})[0].(map[string]interface{}))
+			input.ThresholdExpression = expandExpression(d.Get("threshold_expression").([]interface{})[0].(map[string]interface{}))
 		}
 
 		_, err := conn.UpdateAnomalySubscription(ctx, input)