Update Azure pipelines to report results (#4994)

I didn't have this configured correctly to run on failing builds... obviously that is where this is more useful. Additionally ADO expects XUnit 2, but LIT generates XUnit 1. XUnit 1 is close to JUnit, so we can use that instead.

azure-pipelines.yml

@@ -126,6 +126,7 @@ stages:
       displayName: 'DXC tests'
     - task: PublishTestResults@2
       inputs:
-        testResultsFormat: 'XUnit'
-        testREsultsFiles: '**/testresults.xunit.xml'
+        testResultsFormat: 'JUnit'
+        testResultsFiles: '**/testresults.xunit.xml'
+      condition: succeededOrFailed()