Add auto-baseline main pipeline config for core (#4312)

eng/pipelines/templates/stages/1es-redirect.yml

@@ -26,6 +26,10 @@ extends:
     settings:
       skipBuildTagsForGitHubPullRequests: true
     sdl:
+      ${{ if and(eq(variables['Build.DefinitionName'], 'azure-dev - cli'), eq(variables['Build.SourceBranchName'], 'main'), eq(variables['System.TeamProject'], 'internal')) }}:
+        autobaseline:
+          isMainPipeline: true
+          enableForGitHub: true
       credscan:
         suppressionsFile: $(Build.SourcesDirectory)/eng/CredScanSuppression.json
       sourceRepositoriesToScan: