ci: add org membership check to e2e test job

Author: ctran88

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

@@ -44,6 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Trigger E2E Workflow in backend-sdk-tests and Wait
+        if: ${{ github.event.pull_request.author_association == 'MEMBER' }}
         uses: convictional/[email protected]
         with:
           owner: passageidentity