Swift: add timeout to inetgration tests on macOS

.github/workflows/swift.yml

@@ -65,6 +65,7 @@ jobs:
     if : ${{ github.event_name == 'pull_request' }}
     needs: build-and-test-macos
     runs-on: macos-12-xl
+    timeout-minutes: 60
     steps:
       - uses: actions/checkout@v3
       - uses: ./swift/actions/run-integration-tests