Revert "try without 'export LD_LIBRARY_PATH'"

This reverts commit d1d0c33.

Author: anmyachev

.github/workflows/build-test-reusable.yml

@@ -305,6 +305,7 @@ jobs:
       - name: Build PTI && Run Proton tests
         if: matrix.suite == 'rest'
         run: |
+          export LD_LIBRARY_PATH=${{ env.PTI_LIBS_DIR }}:$LD_LIBRARY_PATH
           cd third_party/proton/test
           pytest test_api.py test_cmd.py test_lib.py test_profile.py test_viewer.py --device xpu -s -v
           cd ..