Add pipeline for release publishing

.buildkite/release-pipelines/publish-release.yml

@@ -0,0 +1,25 @@
+agents:
+  queue: "android"
+
+steps:
+  - label: "Publish Release"
+    plugins:
+      - $CI_TOOLKIT
+    command: |
+      echo '--- :robot_face: Use bot for git operations'
+      source use-bot-for-git
+
+      echo '--- :git: Checkout Release Branch'
+      .buildkite/commands/checkout-release-branch.sh
+
+      echo '--- :ruby: Setup Ruby Tools'
+      install_gems
+
+      echo '--- :package: Publish Release'
+      bundle exec fastlane publish_release_and_cleanup skip_confirm:true
+    agents:
+      queue: "tumblr-metal"
+    retry:
+      manual:
+        # If those jobs fail, one should always prefer re-triggering a new build from ReleaseV2 rather than retrying the individual job from Buildkite
+        allowed: false