Fix perma-diff on gpu_driver_installation_config for node_config

[modular-magician]

Default on driver installation is applied to new node pool creation in GKE 1.30. With this change, the terraform plan shows a diff on gpu_driver_installation_config, which will cause resource recreation.

gpu_driver_installation_config {
  gpu_driver_version = "DEFAULT"
}

This PR will fix the permdiff. More details on b/352610176

Release Note Template for Downstream PRs (will be copied)

container: fixed perma-diff on `node_config.guest_accelerator.gpu_driver_installation_config` field in GKE 1.30+ in `google_container_node_pool` resource

Derived from GoogleCloudPlatform/magic-modules#11152

[github-actions]

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