Add build triggers to pipeline (#30105)

* Add build triggers to pipeline

* Update .azure/pipelines/ci.yml

Co-authored-by: Doug Bunting <[email protected]>

Co-authored-by: Doug Bunting <[email protected]>

Author: wtgodbe

.azure/pipelines/ci.yml

@@ -1,5 +1,10 @@
-# Don't run CI for this config yet. We're not ready to move official builds on to Azure Pipelines
-trigger: none
+# Configure which branches trigger builds
+trigger:
+  batch: true
+  branches:
+    include:
+    - release/2.*
+    - internal/release/2.*
 
 # Run PR validation on all branches
 pr: