feat: Drop random pets from Managed Node Groups (#1372)

BREAKING CHANGES: We now decided to remove `random_pet` resources in Managed Node Groups (MNG). Those were used to recreate MNG if something change and also simulate the newly added argument `node_group_name_prefix`. But they were causing a lot of troubles. To upgrade the module without recreating your MNG, you will need to explicitly reuse their previous name and set them in your MNG `name` argument. Please see [upgrade docs](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/docs/upgrades.md#upgrade-module-to-v1700-for-managed-node-groups) for more details.

versions.tf

@@ -2,9 +2,8 @@ terraform {
   required_version = ">= 0.13.1"
 
   required_providers {
-    aws        = ">= 3.37.0"
+    aws        = ">= 3.40.0"
     local      = ">= 1.4"
-    random     = ">= 2.1"
     kubernetes = ">= 1.11.1"
     http = {
       source  = "terraform-aws-modules/http"