feat: Enable throughput & iops configs for managed node_groups (#1584)

examples/managed_node_groups/main.tf

@@ -73,10 +73,17 @@ module "eks" {
 
   node_groups = {
     example = {
+      create_launch_template = true
+
       desired_capacity = 1
       max_capacity     = 10
       min_capacity     = 1
 
+      disk_size       = 50
+      disk_type       = "gp3"
+      disk_throughput = 150
+      disk_iops       = 3000
+
       instance_types = ["t3.large"]
       capacity_type  = "SPOT"
       k8s_labels = {