No build native in site extension (#22738)

Author: jkotalik

.azure/pipelines/ci.yml

@@ -159,6 +159,7 @@ stages:
                 -noBuildRepoTasks
                 -pack
                 -noBuildDeps
+                -noBuildNative
                 $(_BuildArgs)
                 $(_InternalRuntimeDownloadArgs)
         condition: ne(variables['Build.Reason'], 'PullRequest')
@@ -696,4 +697,4 @@ stages:
       enableSymbolValidation: false
       enableSigningValidation: false
       enableNugetValidation: false
-      publishInstallersAndChecksums: true
+      publishInstallersAndChecksums: true