Remove ForceNew for enablePrivateNodes (#15747) (#11118)

[upstream:78e89b572ef77fb1b5afe26181e15825bc82377d]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

google-beta/services/container/resource_container_cluster.go

@@ -2028,7 +2028,6 @@ func ResourceContainerCluster() *schema.Resource {
 						"enable_private_nodes": {
 							Type:             schema.TypeBool,
 							Optional:         true,
-							ForceNew:         true,
 							AtLeastOneOf:     privateClusterConfigKeys,
 							DiffSuppressFunc: containerClusterPrivateClusterConfigSuppress,
 							Description:      `Enables the private cluster feature, creating a private endpoint on the cluster. In a private cluster, nodes only have RFC 1918 private addresses and communicate with the master's private endpoint via private networking.`,

google-beta/services/container/resource_container_cluster_test.go

@@ -8409,6 +8409,11 @@ func TestAccContainerCluster_withEnablePrivateEndpointToggle(t *testing.T) {
 			},
 			{
 				Config: testAccContainerCluster_withEnablePrivateEndpoint(clusterName, "false", networkName, subnetworkName),
+				ConfigPlanChecks: resource.ConfigPlanChecks{
+					PreApply: []plancheck.PlanCheck{
+						plancheck.ExpectResourceAction("google_container_cluster.with_enable_private_endpoint", plancheck.ResourceActionUpdate),
+					},
+				},
 			},
 			{
 				ResourceName:            "google_container_cluster.with_enable_private_endpoint",
@@ -8419,7 +8424,6 @@ func TestAccContainerCluster_withEnablePrivateEndpointToggle(t *testing.T) {
 		},
 	})
 }
-
 func testAccContainerCluster_withEnablePrivateEndpoint(clusterName, flag, networkName, subnetworkName string) string {
 	return fmt.Sprintf(`
 data "google_container_engine_versions" "uscentral1a" {