[SYCL] Revise SYCL Cmake config for LIT tests (#3034)
1. Aligned CMake target configuration SYCL LIT test location.
2. Added support for running on-device LIT tests for prebuilt SYCL compiler
and runtime binaries following the
[instructions](https://github.com/intel/llvm/blob/sycl/sycl/test/on-device/README.md).
3. Removed obsolete dependencies from the build
4. Added Level_Zero headers support to LIT infra to support
online_compiler/online_compiler_L0.cpp test
5. add LEVEL_ZERO_INCLUDE_DIR to global scope to be used in tests;
