[macos] Add path variables to packer templates (#9155)

* Update macos-12.pkr.hcl template

* Update remaining macos templates

* Update Get-ToolsetContent and get_toolset_value functions

* Fix ~ symbol expansion issues

* Fix bad path in macOS-14.arm64.anka.pkr.hcl

images/macos/scripts/helpers/Common.Helpers.psm1

@@ -40,9 +40,17 @@ function Get-OSVersion {
     }
 }
 
-# Get the value of the toolset
 function Get-ToolsetContent {
-    $toolsetPath = Join-Path $env:HOME "image-generation" "toolset.json"
+    <#
+    .SYNOPSIS
+        Retrieves the content of the toolset.json file.
+
+    .DESCRIPTION
+        This function reads the toolset.json in path provided by IMAGE_FOLDER
+        environment variable and returns the content as a PowerShell object.
+    #>
+
+    $toolsetPath = Join-Path $env:IMAGE_FOLDER "toolset.json"
     $toolsetJson = Get-Content -Path $toolsetPath -Raw
     ConvertFrom-Json -InputObject $toolsetJson
 }

images/macos/scripts/helpers/utils.sh

@@ -82,7 +82,7 @@ is_Veertu() {
 }
 
 get_toolset_value() {
-    local toolset_path=$(echo "$HOME/image-generation/toolset.json")
+    local toolset_path=$(echo "$IMAGE_FOLDER/toolset.json")
     local query=$1
     echo "$(jq -r "$query" $toolset_path)"
 }