[Windows] Set WSLv1 version on Windows Server 2022 (#5762)

* Set WSLv1 version on Windows Server 2022

* Create path if missing

images/win/scripts/ImageHelpers/ImageHelpers.psm1

@@ -17,6 +17,7 @@ Export-ModuleMember -Function @(
     'Set-DefaultPath'
     'Add-MachinePathItem'
     'Add-DefaultPathItem'
+    'Add-DefaultItem'
     'Get-SystemVariable'
     'Get-DefaultVariable'
     'Set-SystemVariable'

images/win/scripts/ImageHelpers/PathHelpers.ps1

@@ -75,7 +75,7 @@ function Set-DefaultVariable {
 
     $key = [Microsoft.Win32.Registry]::LocalMachine.OpenSubKey($Name, $Writable)
     $key.SetValue($DefaultVariable, $Value, $Kind)
-    Get-DefaultVariable $DefaultVariable
+    Get-DefaultVariable -DefaultVariable $DefaultVariable -Name $Name
     $key.Handle.Close()
     [System.GC]::Collect()
 }
@@ -135,6 +135,25 @@ function Add-DefaultPathItem {
     Disconnect-Hive
 }
 
+function Add-DefaultItem {
+    param(
+        [string]$DefaultVariable,
+        [string]$Value,
+        [string]$Name = "DEFAULT\Environment",
+        [string]$Kind = "ExpandString",
+        [bool]$Writable = $true
+    )
+
+    Connect-Hive
+    $regPath = Join-Path "HKLM:\" $Name
+    if (-not (Test-Path $Name)) {
+        Write-Host "Creating $regPath key"
+        New-Item -Path $regPath -Force | Out-Null
+    }
+    Set-DefaultVariable -DefaultVariable $DefaultVariable -Value $Value -Name $Name -Kind $Kind -Writable $Writable
+    Disconnect-Hive
+}
+
 function New-ItemPath {
     param (
         [string]$Path

images/win/scripts/Installers/Finalize-VM.ps1

@@ -6,6 +6,13 @@
 Write-Host "Cleanup WinSxS"
 Dism.exe /online /Cleanup-Image /StartComponentCleanup /ResetBase
 
+# Sets the default install version to v1 for new distributions
+# https://github.com/actions/virtual-environments/issues/5760
+if (Test-IsWin22) {
+    Write-Host "Sets the default install version to v1 for new distributions"
+    Add-DefaultItem -DefaultVariable "DefaultVersion" -Value 1 -Name "DEFAULT\Software\Microsoft\Windows\CurrentVersion\Lxss" -Kind "DWord"
+}
+
 Write-Host "Clean up various directories"
 @(
     "$env:SystemDrive\Recovery",