[updatecli] retrieve EKS version when tracking AMI node version

[dduportal]

The updatecli manifest https://github.com/jenkins-infra/terraform-aws-sponsorship/blob/main/updatecli/updatecli.d/eks-ami-release.yaml which tracks the AMI version of EKS nodes has the Kubernetes version 1.29 written "raw" in it:

terraform-aws-sponsorship/updatecli/updatecli.d/eks-ami-release.yaml

Line 32 in 1818fc0

--path "/aws/service/eks/optimized-ami/1.29/" \

But since we upgraded EKS to 1.30, it creates PR proposing to revert node AMIs to an older (incompatible version) such as #140.

The manifest shall be patched with the same technique as other manifests (

terraform-aws-sponsorship/updatecli/updatecli.d/eks-aws-ebs-csi-driver.yaml

Lines 15 to 31 in 1818fc0

	sources:
	getClusterKubernetesVersion:
	kind: hcl
	name: Retrieve the Kubernetes version used in the EKS cluster
	spec:
	file: eks-cijenkinsio-agents-2.tf
	path: module.cijenkinsio_agents_2.cluster_version
	getLatestAwsEbsCsiDriverVersion:
	kind: shell
	name: Retrieve the latest version of aws-ebs-csi-driver for Kubernetes {{ source "getClusterKubernetesVersion" }}
	dependson:
	- getClusterKubernetesVersion
	spec:
	command: |
	aws eks describe-addon-versions \
	--kubernetes-version {{ source "getClusterKubernetesVersion" }} \

) to dynamically discover the the EKS version.