Skip CodeQL in public builds (#54886)

.azure/pipelines/ci-public.yml

@@ -73,6 +73,10 @@ variables:
   value: ''
 - name: _InternalRuntimeDownloadCodeSignArgs
   value: ''
+- name: Codeql.Enabled
+  value: false
+- name: Codeql.SkipTaskAutoInjection
+  value: true
 - template: /eng/common/templates/variables/pool-providers.yml
 
 resources: