[Windows] win2022: enable use of test-signed code (#4098)

images/win/scripts/Tests/WindowsFeatures.Tests.ps1

@@ -50,3 +50,9 @@ Describe "GDIProcessHandleQuota" {
         (Get-ItemProperty $regPath32).GDIProcessHandleQuota | Should -BeExactly 20000
     }
 }
+
+Describe "Test Signed Drivers" -Skip:(-not (Test-IsWin22)) {
+    It "bcdedit testsigning should be Yes"{
+        "$(bcdedit)" | Should -Match "testsigning\s+Yes"
+    }
+}

images/win/windows2022.json

@@ -110,6 +110,14 @@
                 "if (-not ((net localgroup Administrators) -contains '{{user `install_user`}}')) { exit 1 }"
             ]
         },
+        {
+            "type": "powershell",
+            "inline": [
+                "bcdedit.exe /set TESTSIGNING ON"
+            ],
+            "elevated_user": "{{user `install_user`}}",
+            "elevated_password": "{{user `install_password`}}"
+        },
         {
             "type": "powershell",
             "environment_vars": [
@@ -143,7 +151,7 @@
         },
         {
             "type": "windows-restart",
-            "restart_timeout": "10m"
+            "restart_timeout": "30m"
         },
         {
             "type": "powershell",