Tweak workflow event so ci can retrieve credentails correctly (#1102) (#1104)

Signed-off-by: Peter Zhu <[email protected]>
(cherry picked from commit 8868a42)

Co-authored-by: Peter Zhu <[email protected]>

Author: opensearch-trigger-bot[bot]

.github/workflows/CI-workflow.yml

@@ -1,12 +1,13 @@
 name: Build and Test ml-commons
 # This workflow is triggered on pull requests and push to any branches
 on:
-  pull_request:
-    branches:
-      - "*"
   push:
-    branches:
-      - "*"
+    branches-ignore:
+      - 'backport/**'
+      - 'create-pull-request/**'
+      - 'dependabot/**'
+  pull_request_target:
+    types: [opened, synchronize, reopened]
 
 permissions:
   id-token: write