/kind feature

Describe the solution you'd like
We would like to request support for Amazon Linux 2023 (AL2023) AMIs. (EDIT: General Support is already implemented)

Specifically, it would be helpful to have AL2023 added to the AMI build pipeline and for public images to be published via SSM parameters, similar to how Amazon Linux 2 and Ubuntu images are currently handled.

This would allow users to adopt AL2023 more easily in CAPA-managed clusters, in line with AWS's shift toward AL2023 as the new long-term supported OS.

Anything else you would like to add:
Right now, it’s not possible to use the imageLookupBaseOS setting with al2023, since there are no public AL2023 images published by CAPA. As a result, we have to fall back to AL2 or Ubuntu, even though we would prefer to begin using AL2023 in our clusters.

If support for AL2023 is already being discussed or tracked elsewhere, we’d appreciate a reference. Otherwise, we’re happy to help test or contribute if needed.

Thanks for your work maintaining this project!

Environment:

• Cluster-api-provider-aws version: v2.7.1
• Kubernetes version (use kubectl version): v1.31
• OS (e.g. from /etc/os-release): Amazon Linux 2/Ubuntu