chore(ci): run pull request workflow on ready for review and synchronize (#7341)

Author: trivikr

.github/workflows/pull-request-build.yml

@@ -1,8 +1,7 @@
 name: Build SDK
 on:
-  pull_request_review:
-    types: [ submitted ]
-    branches: [ main ]
+  pull_request:
+    types: [synchronize, ready_for_review]
 
 concurrency:
   group: start-pull-request-build-${{ github.ref }}
@@ -15,7 +14,7 @@ env:
 
 jobs:
   aws-sdk-pr-build:
-    if: github.event.review.state == 'approved'
+    if: github.event.pull_request.draft == false
     runs-on: ubuntu-latest
     permissions:
       id-token: write