Upgrade Kubernetes from 1.28 to latest stable version

[jpvelasco]

The current Kubernetes version (1.28) used in this project is approaching the end of its standard support period on November 26, 2024. If not updated, the cluster will enter an extended support period, incurring additional fees. This could lead to increased operational costs and potential security risks if left unaddressed.

Should upgrade the Kubernetes cluster to the latest stable version before the end of the standard support period. This solution should include:

1. Determining the appropriate target Kubernetes version
2. Updating the cluster configuration
3. Ensuring compatibility with Agones and Open Match
4. Updating all relevant documentation

The upgrade process should ideally be completed soon to avoid entering the extended support period.

Additional context

• The upgrade may require updates to game server configurations or Agones/Open Match integrations to maintain compatibility with the new Kubernetes version.
• Reference for Amazon EKS Extended Support pricing and information: https://aws.amazon.com/blogs/containers/amazon-eks-extended-support-for-kubernetes-versions-pricing/

[sdpoueme]

Looking at the blueprint details. We probably need to update the versions there and in the env variables used for deployments as well.