Fix dpcpp.cmake to recognise icx-cl as the ICX compiler on Windows

The SYCL_ONEAPI_ICX detection checked for 'icx' and 'icpx' but not for
'icx-cl', the MSVC-compatibility-mode variant of the ICX compiler used
when building with Ninja/CMake on Windows. Without this match the
cmake logic fell through to the Linux/Clang flag path, injecting flags
such as -std=c++17, -fvisibility=hidden and -ffp-model=precise that
icx-cl rejects with -Werror,-Wunknown-argument errors.

Add 'icx-cl' to the SYCL_ONEAPI_ICX name check so the correct Windows
ICX flag set is selected.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: stefanatwork

common/cmake/dpcpp.cmake

@@ -24,7 +24,7 @@ GET_FILENAME_COMPONENT(SYCL_COMPILER_DIR ${CMAKE_CXX_COMPILER} PATH)
 GET_FILENAME_COMPONENT(SYCL_COMPILER_NAME ${CMAKE_CXX_COMPILER} NAME_WE)
 IF (NOT SYCL_COMPILER_NAME STREQUAL "clang++")
   SET(SYCL_ONEAPI TRUE)
-  IF (SYCL_COMPILER_NAME STREQUAL "icx" OR SYCL_COMPILER_NAME STREQUAL "icpx")
+  IF (SYCL_COMPILER_NAME STREQUAL "icx" OR SYCL_COMPILER_NAME STREQUAL "icpx" OR SYCL_COMPILER_NAME STREQUAL "icx-cl")
     SET(SYCL_ONEAPI_ICX TRUE)
   ELSE()
     SET(SYCL_ONEAPI_ICX FALSE)