fix: Correct remote access variable for security groups and add example for additional IAM policies (#1766)

Co-authored-by: Anton Babenko <anton@antonbabenko.com>

modules/eks-managed-node-group/variables.tf

@@ -334,7 +334,7 @@ variable "launch_template_version" {
 
 variable "remote_access" {
   description = "Configuration block with remote access settings"
-  type        = map(string)
+  type        = any
   default     = {}
 }