feat!: Upgrade min AWS provider and Terraform versions to 6.0 and 1.5.7 respectively (#3412)

* feat!: Upgrade min AWS provider and Terraform versions to `6.0` and `1.5.7` respectively

* fix: Remove deprecated arguments in AWS v6.0 provider, upgrade Helm provider to v3.0, bump VPC module to v6.0

* fix: Remove `aws-auth` sub-module

* fix: Remove `platform` and `cluster_service_ipv4_cidr` variables from `user-data` sub-module

* fix: Resolve all marked `todos` that have been accumulated

* fix: Set default `http_put_response_hop_limit` to `1`

* fix: Remove IRSA support from Karpenter sub-module

* fix: Avoid making GET requests from data sources unless absolutely necessary

* feat: Add variable optional attribute definitions

* feat: Bump KMS key module version to latest, add remaining variable attribute definitions

* fix: Remove `cluster_` prefix from variable names to better match the underlying API

* fix: Move all EFA logic to the nodegroup itself

* fix: Remove arguments that do not make sense in EKS

* fix: Updates from plan validation

* fix: Remove more self-managed node group attributes that are commonly not used in EKS clusters

* fix: Remove data plane compute `*_defaults` variables that do not work with variable optional attributes

* fix: Ignore changes to `bootstrap_self_managed_addons` to aid in upgrade

* feat: Add support for `region` argument on relevant resources

* feat: Initial pass on upgrade guide

* fix: Updates from testing and validating EKS managed node group

* fix: Updates from testing and validating self-managed node group

* docs: Ensure addon ussage documented is aligned

* feat: Switch to dualstack OIDC issuer URL

* feat: Allow sourcing over overriding the Karpenter assume role policy

* fix: Use `Bool` instead of `StringEquals` for DenyHTTP queue policy

* fix: Correct use of `nullable` and default value propagation

examples/eks-hybrid-nodes/main.tf

@@ -3,11 +3,11 @@ provider "aws" {
 }
 
 provider "helm" {
-  kubernetes {
+  kubernetes = {
     host                   = module.eks.cluster_endpoint
     cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
 
-    exec {
+    exec = {
       api_version = "client.authentication.k8s.io/v1beta1"
       command     = "aws"
       # This requires the awscli to be installed locally where Terraform is executed
@@ -20,7 +20,7 @@ locals {
   name   = "ex-${basename(path.cwd)}"
   region = "us-west-2"
 
-  cluster_version = "1.33"
+  kubernetes_version = "1.33"
 
   tags = {
     Test       = local.name
@@ -36,20 +36,20 @@ locals {
 module "eks" {
   source = "../.."
 
-  cluster_name    = local.name
-  cluster_version = local.cluster_version
+  name               = local.name
+  kubernetes_version = local.kubernetes_version
 
-  cluster_endpoint_public_access           = true
+  endpoint_public_access                   = true
   enable_cluster_creator_admin_permissions = true
 
-  cluster_addons = {
+  addons = {
     coredns                = {}
     eks-pod-identity-agent = {}
     kube-proxy             = {}
   }
 
   create_node_security_group = false
-  cluster_security_group_additional_rules = {
+  security_group_additional_rules = {
     hybrid-all = {
       cidr_blocks = [local.remote_network_cidr]
       description = "Allow all traffic from remote node/pod network"
@@ -60,7 +60,7 @@ module "eks" {
     }
   }
 
-  cluster_compute_config = {
+  compute_config = {
     enabled    = true
     node_pools = ["system"]
   }
@@ -75,7 +75,7 @@ module "eks" {
   vpc_id     = module.vpc.vpc_id
   subnet_ids = module.vpc.private_subnets
 
-  cluster_remote_network_config = {
+  remote_network_config = {
     remote_node_networks = {
       cidrs = [local.remote_node_cidr]
     }
@@ -106,7 +106,7 @@ data "aws_availability_zones" "available" {
 
 module "vpc" {
   source  = "terraform-aws-modules/vpc/aws"
-  version = "~> 5.0"
+  version = "~> 6.0"
 
   name = local.name
   cidr = local.vpc_cidr