cloudposse/terraform-aws-eks-cluster v4.9.0 on GitHub

feat: add EKS Auto Mode support @Benbentwo (#259)

## Summary - Add `compute_config`, `storage_config`, and `elastic_load_balancing` object variables for fully configurable Auto Mode support - Add dynamic blocks for `compute_config`, `storage_config`, and `elastic_load_balancing` on `aws_eks_cluster` - Add `sts:TagSession` to cluster role trust policy when Auto Mode enabled - Attach 4 Auto Mode cluster IAM policies (`AmazonEKSComputePolicy`, `AmazonEKSBlockStoragePolicy`, `AmazonEKSLoadBalancingPolicy`, `AmazonEKSNetworkingPolicy`) - Add `auto_mode_enabled` output - Add consistency check ensuring all three capabilities are toggled together - Auto-set `bootstrap_self_managed_addons = false` when Auto Mode is enabled - Bump AWS provider minimum to `>= 5.79.0`

All defaults preserve current behavior -- this is additive and non-breaking.

Test plan

terraform validate passes (verified locally)
terraform plan on existing cluster shows no changes (backward compat)
Deploy new cluster with Auto Mode enabled, verify via aws eks describe-cluster
Verify cluster IAM role has Auto Mode policies attached
Verify bootstrap_self_managed_addons is correctly auto-set

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