ci(azure): validate mtp output layout

Co-authored-by: baywet <7905502+baywet@users.noreply.github.com>

Author: Copilot

.azure-pipelines/ci-build.yml

@@ -111,6 +111,7 @@ extends:
             $testExecutables = @($testExecutableCandidates | Where-Object {
               # Match the app produced by its own project output: test\<ProjectName>\bin\<Configuration>\<TFM>\<ProjectName>.exe.
               $_.Directory.Parent.Name -eq "$(BuildConfiguration)" -and
+              $_.Directory.Parent.Parent.Name -eq "bin" -and
               $_.BaseName -eq $_.Directory.Parent.Parent.Parent.Name -and
               # xUnit v3 MTP test apps copy the runner assembly next to the generated executable.
               @(Get-ChildItem -Path $_.DirectoryName -Filter "xunit.v3.mtp*.dll").Count -gt 0