v0.43.0 should require aws >=4.0, because it uses root level "replicas_per_node_group"

[nate-selzer]

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Describe the Bug

The required version of the aws provider for v0.43.0 of this module is >= 3.26

As you can see here, the variable aws_elasticache_replication_group.replicas_per_node_group is used in this version of the module.

However, this variable was only introduced in v4.0.0 of the aws terraform provider (previously, it was specified under the cluster_mode variable)

Expected Behavior

Expect the module to use only variables that are supported by the versions of the aws provider specified in versions.tf of the module.

Steps to Reproduce

Steps to reproduce the behavior:

1. Using v0.43.0 of this module, implement a component that requires v3.x of the aws terraform provider
2. Specify replicas_per_node_group
3. Run `atmos terraform plan -s

4. See error

   
   Error: Unsupported argument
   
   on .terraform/modules/redis_clusters.redis/main.tf line 150, in resource "aws_elasticache_replication_group" "default":
   150:   replicas_per_node_group = var.cluster_mode_enabled ? var.cluster_mode_replicas_per_node_group : null

An argument named "replicas_per_node_group" is not expected here.

## Screenshots
If applicable, add screenshots or logs to help explain your problem.

## Environment (please complete the following information):

Anything that will help us triage the bug will help. Here are some ideas:
 - My output of `atmos terraform version`

Terraform v0.14.11

• provider registry.terraform.io/cloudposse/utils v0.17.25
• provider registry.terraform.io/hashicorp/aws v3.75.2
• provider registry.terraform.io/hashicorp/external v2.2.2
• provider registry.terraform.io/hashicorp/local v2.2.3
• provider registry.terraform.io/hashicorp/null v3.1.1
• provider registry.terraform.io/hashicorp/random v3.3.0
• provider registry.terraform.io/hashicorp/template v2.2.0

Your version of Terraform is out of date! The latest version is 1.2.2. You can update by downloading from https://www.terraform.io/downloads.html

## Additional Context
This issue also exists for the `num_node_groups` variable (and maybe others)