add /usr/lib/python3.11 to pythonpath

Author: patapenka-alexey

.github/workflows/packing.yml

@@ -555,10 +555,9 @@ jobs:
 
       - name: Run tests
         run: |
-          apt install -y `pwd`/deb_dist/python3-tarantool_*.deb
           ls -la /usr/lib/python3/dist-packages/tarantool
           . .venv/bin/activate
-          export PYTHONPATH=$PYTHONPATH:/usr/bin:/usr/lib/python3/dist-packages/tarantool
+          export PYTHONPATH=$PYTHONPATH:/usr/lib/python3.11:/usr/bin:/usr/lib/python3/dist-packages/tarantool
           echo $PYTHONPATH
           make test-pure-install
         if: matrix.target.dist == 'bookworm' || matrix.target.dist == 'noble'