pre_bootstrap_user_data in eks_managed_node_groups is unusable for BOTTLEROCKET and hence containerd cannot be used

[dwaiba]

learn-terraform-provision-eks-cluster/eks-cluster.tf

Line 30 in af9294c

pre_bootstrap_user_data = <<-EOT

and

learn-terraform-provision-eks-cluster/eks-cluster.tf

Line 48 in af9294c

pre_bootstrap_user_data = <<-EOT

cannot be used for BOTTLEROCKET_x86_64 as it throws * : Ec2LaunchTemplateInvalidConfiguration: User data was not a TOML format that could be processed .
BOTTLEROCKET needs to be used for containerd in the EKS nodes rather than the default AL2_x86_64 .

Presently in this repo none of the BOTTLEROCKET amitypes like BOTTLEROCKET_ARM_64 BOTTLEROCKET_x86_64 BOTTLEROCKET_ARM_64_NVIDIA BOTTLEROCKET_x86_64_NVIDIA cannot be used without changes.