Provide Terraform fixes

These fixes include:
- Handle empty deployer state when not using a dpeloyer
- Adding tags to more resources
- Adding 'var.' before variables in output file

Author: Marges, RSY (Rick)

deploy/terraform/terraform-units/modules/sap_landscape/storage_accounts.tf

@@ -396,6 +396,7 @@ resource "azurerm_private_endpoint" "transport" {
                                            local.prefix,
                                            local.resource_suffixes.storage_private_link_transport
                                          )
+  tags                                 = var.tags
   custom_network_interface_name        = format("%s%s%s%s",
                                            var.naming.resource_prefixes.storage_private_link_transport,
                                            local.prefix,
@@ -587,6 +588,7 @@ resource "azurerm_private_endpoint" "install" {
                                            local.prefix,
                                            local.resource_suffixes.storage_private_link_install
                                          )
+  tags                                 = var.tags
   custom_network_interface_name        = format("%s%s%s%s",
                                           var.naming.resource_prefixes.storage_private_link_install,
                                           local.prefix,

deploy/terraform/terraform-units/modules/sap_landscape/variables_local.tf

@@ -25,9 +25,7 @@ locals {
   region                                          = var.infrastructure.region
 
   // Firewall
-
-
-  firewall_exists                                 = length(trimspace(coalesce(var.deployer_tfstate.firewall_id, " "))) > 0
+  firewall_exists                                 = var.use_deployer ? length(trimspace(coalesce(var.deployer_tfstate.firewall_id, ""))) > 0 : false
   firewall_id                                     = local.firewall_exists ? try(var.deployer_tfstate.firewall_id, "") : ""
   firewall_ip                                     = local.firewall_exists ? try(var.deployer_tfstate.firewall_ip, "") : ""
   firewall_name                                   = local.firewall_exists ? try(split("/", local.firewall_id)[8], "") : ""

deploy/terraform/terraform-units/modules/sap_system/output_files/inventory.tf

@@ -266,10 +266,10 @@ resource "local_file" "sap-parameters_yml" {
               calapi_kv                   = var.calapi_kv
               sap_cal_product_name        = var.sap_cal_product_name
 
-              single_server                          = length(webdispatcher_server_ips) + length(application_server_ips) + length(scs_server_ips) + length(database_server_ips) == 1 ? (
-                                                       true) : (
-                                                       false
-                                                     )
+              single_server               = length(var.webdispatcher_server_ips) + length(var.application_server_ips) + length(var.scs_server_ips) + length(var.database_server_ips) == 1 ? (
+                                            true) : (
+                                            false
+                                          )
 
     }
   )