add runner install script for windows image (#8671)

images/win/scripts/Installers/Install-Runner.ps1

@@ -0,0 +1,14 @@
+################################################################################
+##  File:  Install-Runner.ps1
+##  Desc:  Install Runner for GitHub Actions
+##  Supply chain security: none
+################################################################################
+
+Write-Host "Download latest Runner for GitHub Actions"
+$release = Invoke-RestMethod -Uri "https://api.github.com/repos/actions/runner/releases/latest"
+$version = $release.tag_name.Trim("v")
+$downloadUrl = ($release.assets.browser_download_url -ilike "*actions-runner-win-x64-${version}.zip*") | Select-Object -First 1
+New-Item -Path "C:\ProgramData\runner" -ItemType Directory
+$packagePath = Start-DownloadWithRetry -Url $downloadUrl -DownloadPath "C:\ProgramData\runner"
+
+Invoke-PesterTests -TestFile "RunnerCache"

images/win/scripts/Tests/RunnerCache.tests.ps1

@@ -0,0 +1,7 @@
+Describe "RunnerCache" {
+    Context "runner cache directory not empty" {
+        It "C:\ProgramData\runner" {
+            (Get-ChildItem -Path "C:\ProgramData\runner\*.zip" -Recurse).Count | Should -BeGreaterThan 0
+        }
+    }
+}

images/win/windows2019.json

@@ -173,7 +173,8 @@
                 "{{ template_dir }}/scripts/Installers/Install-Docker-WinCred.ps1",
                 "{{ template_dir }}/scripts/Installers/Install-Docker-Compose.ps1",
                 "{{ template_dir }}/scripts/Installers/Install-PowershellCore.ps1",
-                "{{ template_dir }}/scripts/Installers/Install-WebPlatformInstaller.ps1"
+                "{{ template_dir }}/scripts/Installers/Install-WebPlatformInstaller.ps1",
+                "{{ template_dir }}/scripts/Installers/Install-Runner.ps1"
             ]
         },
         {

images/win/windows2022.json

@@ -158,7 +158,8 @@
                 "{{ template_dir }}/scripts/Installers/Install-Docker-WinCred.ps1",
                 "{{ template_dir }}/scripts/Installers/Install-Docker-Compose.ps1",
                 "{{ template_dir }}/scripts/Installers/Install-PowershellCore.ps1",
-                "{{ template_dir }}/scripts/Installers/Install-WebPlatformInstaller.ps1"
+                "{{ template_dir }}/scripts/Installers/Install-WebPlatformInstaller.ps1",
+                "{{ template_dir }}/scripts/Installers/Install-Runner.ps1"
             ]
         },
         {