Make Kubernetes 1.23 the default

[TiberiuGC]

Description

Closes #5607

Trimmed CLI output of creating a cluster on the new version

2022-08-18 10:50:08 [ℹ]  eksctl version 0.110.0-dev+1a73c2b2.2022-08-18T10:42:08Z
2022-08-18 10:50:09 [ℹ]  using Kubernetes version 1.23
2022-08-18 10:50:09 [ℹ]  creating EKS cluster "cluster-1" in "eu-north-1" region with un-managed nodes
2022-08-18 10:50:09 [ℹ]  Kubernetes API endpoint access will use default of {publicAccess=true, privateAccess=false} for cluster "cluster-1" in "eu-north-1"
2022-08-18 10:50:09 [ℹ]  
2 sequential tasks: { create cluster control plane "cluster-1", 
    2 sequential sub-tasks: { 
        wait for control plane to become ready,
        create nodegroup "ng-1",
    } 
}
2022-08-18 11:06:53 [ℹ]  waiting for the control plane availability...
2022-08-18 11:06:53 [✔]  saved kubeconfig as "/Users/tiberiu-weave/.kube/config"
2022-08-18 11:08:01 [ℹ]  nodegroup "ng-1" has 1 node(s)
2022-08-18 11:08:01 [ℹ]  node "ip-192-168-93-174.eu-north-1.compute.internal" is ready
2022-08-18 11:08:02 [✔]  EKS cluster "cluster-1" in "eu-north-1" region is ready

Checklist

• [ ] Added tests that cover your change (if possible)
• [ ] Added/modified documentation as required (such as the README.md, or the userdocs directory)
• [x] Manually tested
• [x] Made sure the title of the PR is a good description that can go into the release notes
• [x] (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! :exploding_head:

• [ ] Backfilled missing tests for code in same general area :tada:
• [ ] Refactored something and made the world a better place :star2:

[ejsmith]

Getting the following error trying to update core-dns on a 1.23 cluster with the rc.0 release.

eksctl utils update-coredns --cluster my-cluster
Error: open assets/coredns-1.23.json: file does not exist

[Himangini]

Getting the following error trying to update core-dns on a 1.23 cluster with the rc.0 release.

eksctl utils update-coredns --cluster my-cluster
Error: open assets/coredns-1.23.json: file does not exist

answered in original PR

[Himangini]

Merge this PR after 21st September.

[cPu1]

EKS 1.23 is not the default yet, so we'll have to wait a bit more before merging.

[cPu1]

EKS 1.23 is not the default yet, so we'll have to wait a bit more before merging.

EKS 1.23 is now the default. This PR is good to merge.