fix: Expand tilde for chdir (issue #389) (#390)

# Pull Request

## Issue

Fixes #389

## Description

Expands ~ with $env:HOME if found in moduleFolderPath

## License

By submitting this pull request, I confirm that my contribution is made
under the terms of the projects associated license.

---------

Co-authored-by: Richard Cheney <richeney@microsoft.com>

Author: richeney

src/ALZ/Private/Deploy-Accelerator-Helpers/Invoke-Terraform.ps1

@@ -23,6 +23,9 @@ function Invoke-Terraform {
         [switch] $silent
     )
 
+    # Resolve to absolute path for `terraform -chdir` switch
+    $moduleFolderPath = (Resolve-Path $moduleFolderPath).Path
+
     if ($PSCmdlet.ShouldProcess("Apply Terraform", "modify")) {
         # Check and Set Subscription ID
         $removeSubscriptionId = $false