Enable codeSignValidation and exclude non-shipping files

Author: AArnott

azure-pipelines/official.yml

@@ -64,6 +64,10 @@ extends:
     parameters:
       sdl:
         sourceAnalysisPool: VSEngSS-MicroBuild2022-1ES
+        codeSignValidation:
+          enabled: true
+          break: true
+          additionalTargetsGlobPattern: -|Variables-*\*.ps1;-|APIScanInputs-*\**;-|test_symbols-*\**;-|MicroBuild\**
         policheck:
           enabled: true
           exclusionsFile: $(System.DefaultWorkingDirectory)\azure-pipelines\PoliCheckExclusions.xml