configuration fails for oneAPI 2023.0

Intel has released oneAPI 2023.0 for Windows which now includes the icpx compiler even though it is not the recommended compiler for Windows.

The configuration fails when trying to test icpx as the CXX compiler.

Work around remove icpx from CMakeDetermineCXXCompiler.cmake

finally list compilers to try
if(NOT CMAKE_CXX_COMPILER_INIT)
set(CMAKE_CXX_COMPILER_LIST CC ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ aCC cl bcc xlC icpx icx clang++)
endif()

Discussion with Intel can be found here.

https://community.intel.com/t5/Intel-oneAPI-Data-Parallel-C/Compiling-Qt-6-41-with-oneAPI-2023-0/m-p/1441404