Update pipeline to run DRTs on PRs (#6770)

* Update pipeline to run DRTs on PRs

* Update pipeline.yml

Author: singhashish-wpf

eng/pipeline.yml

@@ -205,3 +205,34 @@ jobs:
         #
         condition: and(succeeded(), eq(variables['_HelixPipeline'], 'true') ,eq(variables['_BuildConfig'], 'Release'), eq(variables['_PublicBuildPipeline'], 'true'), eq(variables['_ContinuousIntegrationTestsEnabled'], 'true'))
 
+      - task: PowerShell@2
+        displayName: Replace WPF binaries
+        inputs:
+          targetType: 'inline'
+          script: '.\eng\copy-wpf.ps1 -testhost -destination .dotnet -$(_BuildConfig) -arch $(_Platform)'
+          
+      - task: DownloadBuildArtifacts@1
+        displayName: Fetch Test Binaries
+        inputs:
+          buildType: 'specific'
+          project: '9ee6d478-d288-47f7-aacc-f6e6d082ae6d'
+          pipeline: '1145'
+          buildVersionToDownload: 'specific'
+          buildId: '1894970'
+          downloadPath: '$(System.ArtifactsDirectory)\testbinzip\'
+          checkDownloadedFiles: true
+
+      - task: ExtractFiles@1
+        displayName: Extract Test Bins
+        inputs:
+          archiveFilePatterns: '$(System.ArtifactsDirectory)\testbinzip\*.zip'
+          destinationFolder: '$(System.ArtifactsDirectory)\testbins'
+          cleanDestinationFolder: true
+          overwriteExistingFiles: false
+
+      - task: PowerShell@2
+        displayName: Run Tests
+        inputs:
+          targetType: 'inline'
+          script: '.\CIRunDrts.cmd'
+          workingDirectory: '$(System.ArtifactsDirectory)\testbins'