chore(ci): add pull_request_target workflow for v2-release branch in pr-build

Author: ozelalisen

.github/workflows/codebuild-pr-build.yml

@@ -8,6 +8,13 @@ on:
       - main
       - v2-release
   pull_request: {}
+  pull_request_target:
+    branches:
+      - v2-release
+    types:
+      - opened
+      - synchronize
+      - reopened
 
 # For every PR, cancel any previous builds in progress
 # ... but for all other builds we keep them running