[SYCL] Fix XPTI FW lib path for test-e2e on Win

[KseniyaTikhomirova]

This PR helps to avoid hardcoded path symbols and let OS dependent tools to work with paths.
Original version produces path/....\lib\xptifw.lib which causes skip of library linkage on windows.
os.path.normpath is the main change here that helps to handle path separators properly.

[aelovikov-intel]

Please elaborate in the PR description on what the issue was and how this change addresses it. Maybe an example would help on how the code before was producing a wrong command-line/substitution.

[KseniyaTikhomirova]

Please elaborate in the PR description on what the issue was and how this change addresses it. Maybe an example would help on how the code before was producing a wrong command-line/substitution.

done

[aelovikov-intel]

CUDA testing failed due to infrastructure issues but I don't think it's required to re-run it to merge.