Support map users and roles to multiple groups (#424)

* Support map users and roles to multiple groups

* Simplify code by rename `user_arn` to `userarn`, `role_arn` to `rolearn`

* Next version should be 6.x because PR this is a breaking change.

* Update example variables.tf

* Change indent to 2

* Fix map-aws-auth.yaml maybe invalid yaml.

variables.tf

@@ -62,14 +62,22 @@ variable "map_accounts" {
 
 variable "map_roles" {
   description = "Additional IAM roles to add to the aws-auth configmap. See examples/basic/variables.tf for example format."
-  type        = list(map(string))
-  default     = []
+  type = list(object({
+    rolearn  = string
+    username = string
+    groups   = list(string)
+  }))
+  default = []
 }
 
 variable "map_users" {
   description = "Additional IAM users to add to the aws-auth configmap. See examples/basic/variables.tf for example format."
-  type        = list(map(string))
-  default     = []
+  type = list(object({
+    userarn  = string
+    username = string
+    groups   = list(string)
+  }))
+  default = []
 }
 
 variable "subnets" {