cli: allow tagging cloud resources with custom tags (#3033)

terraform/infrastructure/azure/variables.tf

@@ -89,3 +89,8 @@ variable "marketplace_image" {
   default     = null
   description = "Marketplace image for the cluster's nodes."
 }
+
+variable "additional_tags" {
+  type        = map(any)
+  description = "Additional tags that should be applied to created resources."
+}