feat: Pass the primary_ipv6 argument to the AWS provider.

[achernev]

Description, motivation, context

The 5.58.0 release of the Terraform AWS Provider now exposes the PrimaryIpv6 launch template network interfaces parameter via this PR. This parameter causes the first globally-unique IPv6 address to become the primary IPv6 address of instances launched using the template. This is necessary for dual-stack EKS clusters, where the ingress controller's IPv6 address needs to propagate to the ALB during target registration.

The current PR adds the primary_ipv6 flag when used as follows:

module "eks" {
  source  = "terraform-aws-modules/eks/aws"

  # ...
  eks_managed_node_group_defaults = {
    # This is only supported by versions of the terraform-aws-provider >= 5.58.0.
    network_interfaces = [{ primary_ipv6 = true }]
  }
}

Breaking Changes

None.

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects
• I have executed pre-commit run -a on my pull request

% docker run -e "USERID=$(id -u):$(id -g)" -v $(pwd):/lint -w /lint ghcr.io/antonbabenko/pre-commit-terraform:latest run -a
[INFO] Initializing environment for https://github.com/antonbabenko/pre-commit-terraform.
[INFO] Initializing environment for https://github.com/pre-commit/pre-commit-hooks.
[INFO] Installing environment for https://github.com/pre-commit/pre-commit-hooks.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
Terraform fmt............................................................Passed
Terraform docs...........................................................Passed
Terraform validate with tflint...........................................Passed
Terraform validate.......................................................Passed
check for merge conflicts................................................Passed
fix end of files.........................................................Passed
trim trailing whitespace.................................................Passed
mixed line ending........................................................Passed

I am currently using the examples/eks-managed-node-group/eks-bottlerocket.tf in conjunction with the supplied changes (and additional modifications) in a production environment.

[antonbabenko]

This PR is included in version 20.19.0 🎉

[github-actions]

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