[MetricsAdvisor] Make sure snippets can be compiled (Azure#27665)

Author: kinelski

sdk/metricsadvisor/ci.yml

@@ -25,6 +25,7 @@ extends:
   template: ../../eng/pipelines/templates/stages/archetype-sdk-client.yml
   parameters:
     ServiceDirectory: metricsadvisor
+    BuildSnippets: true
     ArtifactName: packages
     Artifacts:
     - name: Azure.AI.MetricsAdvisor