[EKS Prow Cluster] Add karpenter terraform module for eks-prow-build cluster

[koksay]

• Add karpenter module, which creates related roles, sqs queue and events
• Update EKSAdmin role to be able to create above resources
• Add manually added SSO role to terraform

Make sure to update the serviceAccount.annotations field in the infra/aws/terraform/prow-build-cluster/resources/karpenter/flux-hr-karpenter.yaml file (also in infra/aws/terraform/prow-build-cluster/resources/karpenter/prod-cluster-values):

# You may use this command to get the arn after terraform apply:
terraform state show module.karpenter.aws_iam_role.controller\[0\] | grep " arn "

There will be a follow-up PR to add nodepool and nodeclass configration.