Using "storage" in size_resource is not honoured - Azure

[zdlouhy]

Readiness Checklist

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed
• I am reporting the issue to the correct repository (for multi-repository projects)

Expected Behavior

the size specified for a particular topology should be for the storage aspect of the configuration when using size_resource = "storage"

Current Behavior

Issue similar to ##568
When I run terraform apply with specified size_resource = "storage", I got the hot tier sized by RAM instead of storage.

## Terraform definition

resource "ec_deployment" "this" {
  name = "Terraform test"

  region                 = var.region
  version                = data.ec_stack.latest.version
  deployment_template_id = "azure-general-purpose-v2"

  elasticsearch = {
    autoscale = false
    hot = {
      size = "35g"
      size_resource = "storage"
      zone_count = 1
      autoscaling = {}
    }
    coordinating = {
       size = "1g"
       zone_count = 2
       autoscaling = {}
    }
  }
  kibana = {
    size = "1g"
    zone_count = 1
  }
  observability = {
    deployment_id = "self"
    logs          = true
    metrics       = true
  }

}

Steps to Reproduce

Context

Possible Solution

Your Environment

• Version used: elastic/ec 0.8.0
• Running against Elastic Cloud SaaS or Elastic Cloud Enterprise and version: 8.10.1
• Environment name and version (e.g. Go 1.9):
• Server type and version:
• Operating System and version: Ubuntu Focal
• Link to your project: