Fix SDK tests for release build (#17678)

tools/releaseBuild/azureDevOps/templates/release-SDKTests.yml

@@ -122,6 +122,10 @@ jobs:
 
         Get-Content ./NuGet.Config
 
+        # Add workaround to unblock xUnit testing see issue: https://github.com/dotnet/sdk/issues/26462
+        $dotnetPath = if ($IsWindows) { "$env:LocalAppData\Microsoft\dotnet" } else { "$env:HOME/.dotnet" }
+        $env:DOTNET_ROOT = $dotnetPath
+
         dotnet --info
         dotnet restore
         dotnet test /property:RELEASE_VERSION=$releaseVersion --test-adapter-path:. "--logger:xunit;LogFilePath=$(System.DefaultWorkingDirectory)/test-hosting.xml"