refactor: Refactoring to match the rest of terraform-aws-modules (#1583)

variables.tf

@@ -1,24 +1,25 @@
 variable "cluster_enabled_log_types" {
-  default     = []
   description = "A list of the desired control plane logging to enable. For more information, see Amazon EKS Control Plane Logging documentation (https://docs.aws.amazon.com/eks/latest/userguide/control-plane-logs.html)"
   type        = list(string)
+  default     = []
 }
 
 variable "cluster_log_kms_key_id" {
-  default     = ""
   description = "If a KMS Key ARN is set, this key will be used to encrypt the corresponding log group. Please be sure that the KMS Key has an appropriate key policy (https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/encrypt-log-data-kms.html)"
   type        = string
+  default     = ""
 }
 
 variable "cluster_log_retention_in_days" {
-  default     = 90
   description = "Number of days to retain log events. Default retention - 90 days."
   type        = number
+  default     = 90
 }
 
 variable "cluster_name" {
   description = "Name of the EKS cluster. Also used as a prefix in names of related resources."
   type        = string
+  default     = ""
 }
 
 variable "cluster_security_group_id" {
@@ -30,6 +31,7 @@ variable "cluster_security_group_id" {
 variable "cluster_version" {
   description = "Kubernetes version to use for the EKS cluster."
   type        = string
+  default     = null
 }
 
 variable "kubeconfig_output_path" {
@@ -50,8 +52,15 @@ variable "write_kubeconfig" {
   default     = true
 }
 
+variable "default_platform" {
+  description = "Default platform name. Valid options are `linux` and `windows`."
+  type        = string
+  default     = "linux"
+}
+
 variable "manage_aws_auth" {
   description = "Whether to apply the aws-auth configmap file."
+  type        = bool
   default     = true
 }
 
@@ -96,6 +105,7 @@ variable "fargate_subnets" {
 variable "subnets" {
   description = "A list of subnets to place the EKS cluster and workers within."
   type        = list(string)
+  default     = []
 }
 
 variable "tags" {
@@ -110,15 +120,10 @@ variable "cluster_tags" {
   default     = {}
 }
 
-variable "timeouts" {
-  description = "A map of timeouts for create/update/delete operations."
-  type        = map(string)
-  default     = {}
-}
-
 variable "vpc_id" {
   description = "VPC where the cluster and workers will be deployed."
   type        = string
+  default     = null
 }
 
 variable "worker_groups" {