add llvm to path

Author: Steve Lee (POWERSHELL HE/HIM) (from Dev Box)

.pipelines/DSC-Official.yml

@@ -118,6 +118,7 @@ extends:
             ob_restore_phase: true
         - pwsh: |
             Set-Location "$(Build.SourcesDirectory)/DSC"
+            $env:Path += ";C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\Llvm\x64\bin"
             ./build.ps1 -Release -Architecture $(buildName) -SkipLinkCheck
           displayName: 'Build $(buildName)'
           env: