ci: allow e2e untrusted outcome to skip if approval gate is skipped

Signed-off-by: Jensen Tong <jetong@amazon.com>

Author: Jensen Tong

.github/workflows/e2e-test-untrusted.yaml

@@ -43,7 +43,7 @@ jobs:
     secrets: inherit
   outcome:
     name: All E2E Tests Passed
-    if: always()
+    if: ${{ github.event.pull_request.head.repo.id != github.event.pull_request.base.repo.id }}
     runs-on: ubuntu-latest
     needs:
       - e2e