fix: correct helm provider kubernetes block syntax

[lakmalniranga]

This PR updates the helm provider configuration to be compatible with v3.0.0, which has introduced breaking changes to the provider syntax.

Reference: hashicorp/terraform-provider-helm@5a43269

[lakmalniranga]

Closed: I later realized I was already using the latest version. It also requires a minor syntax change for set as well.

For example:

  set = [
    {
      name  = "clusterName"
      value = aws_eks_cluster.eks.name
    },
    {
      name  = "serviceAccount.name"
      value = "aws-load-balancer-controller"
    },
    {
      name  = "vpcId"
      value = aws_vpc.main.id
    }
  ]