Add Computed to ip_assignment and cpu_config to fix diff issue

Sub-config objects were not set into schema in read operation,
causing NSX-populated defaults for the enhanced-networking-stack
cpu_config block and for ip_assignment to perpetually plan back to
empty on every apply.

Mark both TypeList blocks Computed so Terraform accepts the
server-populated values when the user has not explicitly set them.

Note: this drops the "Required: true" caller (nsxt_edge_transport_node_rtep)
since Required+Computed is an invalid schema combination; that specific
line was already flipped to Optional (via getIPAssignmentSchemaForRTEP)
by the separately-landed edge_transport_node_rtep bug-fix PR, so no
change is needed here for it.

Author: ksamoray

nsxt/resource_nsxt_edge_transport_node.go

@@ -492,6 +492,7 @@ func getStandardHostSwitchSchema(nodeType string) *schema.Schema {
 				Type:        schema.TypeList,
 				Description: "Enhanced Networking Stack enabled HostSwitch CPU configuration",
 				Optional:    true,
+				Computed:    true,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
 						"num_lcores": {
@@ -689,6 +690,7 @@ func getIPAssignmentSchema(required bool) *schema.Schema {
 		MaxItems:    1,
 		Required:    required,
 		Optional:    !required,
+		Computed:    true,
 		Elem: &schema.Resource{
 			Schema: map[string]*schema.Schema{
 				"assigned_by_dhcp": {