Add back pull_request action

.github/workflows/integration-test.yml

@@ -1,6 +1,7 @@
 name: Integration Tests
 
 on:
+  pull_request:
   pull_request_target:
     types:
       - opened
@@ -34,14 +35,18 @@ jobs:
       fail-fast: false
 
     steps:
+      - name: Checkout source
+        if: ${{ github.event_name != 'pull_request_target' }}
+        uses: actions/checkout@v4
       - name: Fetch user permission
+        if: ${{ github.event_name == 'pull_request_target' }}
         id: permission
         uses: actions-cool/check-user-permission@v2
         with:
           require: write
           username: ${{ github.triggering_actor }}
       - name: Check user permission
-        if: steps.permission.outputs.require-result == 'false'
+        if: ${{ github.event_name == 'pull_request_target' && steps.permission.outputs.require-result == 'false' }}
         # If the triggering actor does not have write permission (i.e., this is a
         # PR from a fork), then we exit, otherwise most of the integration tests will
         # fail because they require access to secrets.  In this case, a maintainer
@@ -52,10 +57,7 @@ jobs:
           echo "A maintainer must perform a security review and re-run this build, if the code is safe."
           exit 1
       - name: Checkout source
-        if: ${{ github.event_name == 'push' }}
-        uses: actions/checkout@v4
-      - name: Checkout source
-        if: ${{ github.event_name != 'push' }}
+        if: ${{ github.event_name == 'pull_request_target' }}
         uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}