Add to core pipeline for main branch.

Author: blakerouse

.buildkite/pipeline.yml

@@ -371,3 +371,10 @@ steps:
     build:
       commit: "${BUILDKITE_COMMIT}"
       branch: "${BUILDKITE_BRANCH}"
+
+  # wait for packaging to be done
+  - wait: ~
+
+  - label: "Publish to serverless"
+    branches: main
+    trigger: "agentless-serverless-release"