Switch to non-abandoned kubectl provider

[js94x]

Fixes error message "the server could not find the requested resource" on EKS/Kubernetes 1.27 for kubectl_manifest resources

Both resources "kubectl_manifest.karpenter_default_ec2_node_class" and "kubectl_manifest.karpenter_default_node_pool" can not created properly by terraform. This leads to an unfinished state while using this blueprints.

Used EKS version: 1.27

Regardless of whether the k8s resources already exist or not, this error occurs, see here:

terraform apply -target="kubectl_manifest.karpenter_default_ec2_node_class"

kubectl_manifest.karpenter_default_ec2_node_class: Creating...
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [10s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [20s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [30s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [40s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [50s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [1m0s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [1m10s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [1m20s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [1m30s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [1m40s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [1m50s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [2m0s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [2m10s elapsed]
kubectl_manifest.karpenter_default_ec2_node_class: Still creating... [2m20s elapsed]
...
╷
│ Error: default failed to fetch resource from kubernetes: the server could not find the requested resource
│ 
│   with kubectl_manifest.karpenter_default_ec2_node_class,
│   on karpenter.tf line 3, in resource "kubectl_manifest" "karpenter_default_ec2_node_class":
│    3: resource "kubectl_manifest" "karpenter_default_ec2_node_class" {
│ 

The used provider of user gavinbunny seems abandoned, see here:
gavinbunney/terraform-provider-kubectl#270

Therefore I would propose to switch to alekc/kubectl which also fixes the mentioned bug while using kubectl_manifest resource creation.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[chrismld]

LGTM!