[SYCL] fix fp8 regression

[dklochkov-emb]

This PR fixes regression found after merge of FP8 data types extension:

     UXFAIL -- SYCL :: basic_tests/builtins/builtin_unit_tests.cpp
     UXFAIL -- SYCL :: basic_tests/handler/unnamed-lambda-negative.cpp
     UXFAIL -- SYCL :: basic_tests/no_math_in_global_ns.cpp
     UXFAIL -- SYCL :: check_device_code/fp8_conversions.cpp
     UXFAIL -- SYCL :: gdb/accessors-device.cpp
     UXFAIL -- SYCL :: gdb/printers.cpp
     UXFAIL -- SYCL :: regression/bit_cast_lin.cpp
     UXFAIL -- SYCL :: regression/host_builtins_gcc.cpp

[dklochkov-emb]

@intel/llvm-gatekeepers Please, merge it