Correct AI's bad advice and enable code coverage with MTP; fingers crossed

Author: commonsensesoftware

build/mtp.runsettings

@@ -14,7 +14,8 @@ steps:
     dotnet test
     --configuration ${{ parameters.configuration }}
     --report-xunit-trx
-    --settings $(System.DefaultWorkingDirectory)/build/mtp.runsettings
+    --coverage
+    --coverage-output-format cobertura
   displayName: Build and Test
 
 - task: PublishTestResults@2