Attempting to add CodeQL back into the PR pipeline.

Author: mijpeterson

.github/workflows/pr-azure-pipelines.yml

@@ -39,6 +39,11 @@ extends:
       # This prevents auto-injected Roslyn task from running the build again.
       roslyn:
         copyLogsOnly: true
+      codeql:
+        compiled:
+          enabled: true
+          break: true
+        analyzeInPipeline: true
     stages:
     - stage: build
       displayName: Build