Temporary Workaround for AZP Kernel Mode Build (#324)

.azure/templates/build-config-winkernel.yml

@@ -12,6 +12,12 @@ jobs:
   - checkout: self
     submodules: recursive
 
+  - task: PowerShell@2
+    inputs:
+      targetType: inline
+      script: |
+        Start-Process -Wait -FilePath "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe" -ArgumentList "update --passive --norestart --installpath ""C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise"""
+
   - task: VSBuild@1
     continueOnError: true
     inputs: