fix(google_gke): Add variable for GPU driver version

Author: jbuck

google_gke/cluster.tf

@@ -288,6 +288,10 @@ resource "google_container_node_pool" "pools" {
       content {
         type  = local.node_pools_guest_accelerator[each.key].type
         count = local.node_pools_guest_accelerator[each.key].count
+
+        gpu_driver_installation_config {
+          gpu_driver_version = local.node_pools_guest_accelerator[each.key].gpu_driver_version
+        }
       }
     }
 

google_gke/variables.tf

@@ -267,7 +267,11 @@ variable "node_pools_taints" {
 
 variable "node_pools_guest_accelerator" {
   description = "Map containing node pools guest accelerator. Each node pool's name is the key. See locals.tf for defaults."
-  type        = map(map(string))
+  type = map(object({
+    type               = string
+    count              = number
+    gpu_driver_version = optional(string, "LATEST")
+  }))
   default = {
     tf-default-node-pool = {}
   }