Add reopened and ready_for_review triggers to integration tests workflow

- Add reopened trigger (part of default set)
- Add ready_for_review trigger for draft PRs marked ready
- Add Checkout step name for consistency

Author: reyhankoyun

.github/workflows/integration-tests.yml

@@ -5,7 +5,7 @@ on:
   push:
     branches: ["main"]
   pull_request_target:
-    types: [opened, synchronize, labeled]
+    types: [opened, synchronize, reopened, ready_for_review, labeled]
 
 env:
   CARGO_TERM_COLOR: always
@@ -28,7 +28,8 @@ jobs:
       contents: read
 
     steps:
-    - uses: actions/checkout@v5
+    - name: Checkout
+      uses: actions/checkout@v5
       with:
         ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}