feat: Add an AMI version output to modules/eks-managed-node-group

[jkt-signal]

Description

Adds an output to the eks-managed-node-group module with the release version used for the node group.

Motivation and Context

The release version being used (when not supplied from the outside with the ami_release_version or ami_id variables) is only available in a resource and locals private to this module. Users of the module can therefore not determine what AMI release version is being used if they use use_latest_ami_release_version; this change adds an output with that information, which makes it possible for users of the module to determine whether an update is happening (by comparing to an aws_eks_managed_node_group data resource, for example).

Breaking Changes

No, this only adds an output and makes no breaking changes.

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

The existing examples/eks-managed-node-group applies with no changes in the plan after this commit. The examples do not seem to include examples of using the outputs of the module, and I did not add one.

• I have executed pre-commit run -a on my pull request

[bryantbiggs]

I don't see why this is useful, could you elaborate? if you want to know the release version used by a node group, you can look in the console or use the API https://docs.aws.amazon.com/cli/latest/reference/eks/describe-nodegroup.html

[bryantbiggs]

going to close this for now since I don't think we need to continue to expand the surface are of inputs/outputs for things like this

[jkt-signal]

I don't see why this is useful, could you elaborate? if you want to know the release version used by a node group, you can look in the console or use the API https://docs.aws.amazon.com/cli/latest/reference/eks/describe-nodegroup.html

This isn't for looking at the version manually; I'd like to use it to set up a Terraform precondition block to require manual confirmation if a terraform apply is about to upgrade the Kubernetes version on our managed node groups.

[bryantbiggs]

that still doesn't make sense. you can set the Kubernetes version that should be used by the node group and control when and to what version it is upgraded

[jkt-signal]

Sorry, that was a typo; we do fix the Kubernetes version, I meant the AMI version.

[bryantbiggs]

still not following - we support tracking latest, otherwise you can specify the AMI version if you'd like. nothing to do with outputs

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.