[2.9][ForwardPort] KDM Update for K8s April 2024 patch release about rancher

[rishabhmsra]

Fresh install checks - PASS

• On rancher version v2.9-head, KDM pointing to dev-v2.9 branch, cluster creation succeeds for 1.28.9-rancher1-1, v1.27.13-rancher1-1 on all network providers - canal/flannel/weave/calico
• Network checks look good
• Canal network checks look good

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Upgrade checks - PASS

• On rancher v2.8.4-rc3, KDM pointing to release-v2.8, cluster creation succeeds for k8s 1.28.8-rancher1-1, v1.27.12-rancher1-1 version with all network providers.
• Pre-upgrade checks look good.
• Upgraded rancher to v2.9-head.
• Made sure the KDM points to dev-v2.9
• Upgraded cluster to k8s version - 1.28.9-rancher1-1 and v1.27.13-rancher1-1
• Post upgrade checks look good.

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RKE default k8s version - PASS

dev-v2.9 should have the default as v1.28.9-rancher1-1

"RKEDefaultK8sVersions": {
  "0.3": "v1.16.3-rancher1-1",
  "default": "v1.28.9-rancher1-1"
 }

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RKE standalone checks passed using rke 1.6.0-rc3 version.

All checks passed, hence closing the issue.