[EC-393] Import iopstcosmosbonusbackup in Terraform (#1124)

src/domains/cgn/_modules/storage_accounts/storage_account_cosmos_backup.tf

@@ -0,0 +1,21 @@
+module "storage_account_cosmos_backup" {
+  source = "github.com/pagopa/terraform-azurerm-v3//storage_account?ref=v8.36.1"
+
+  name                = "${replace(var.project, "-", "")}stcosmosbonusbackup"
+  resource_group_name = var.resource_group_name
+  location            = var.location
+
+  account_kind                         = "StorageV2"
+  account_tier                         = "Standard"
+  access_tier                          = "Cool"
+  account_replication_type             = "GRS"
+  public_network_access_enabled        = false
+  allow_nested_items_to_be_public      = true
+  use_legacy_defender_version          = false
+  blob_container_delete_retention_days = 7
+  blob_delete_retention_days           = 7
+
+  enable_low_availability_alert = false
+
+  tags = var.tags
+}