Summary
Replace oneDNN C API calls in DnnlExt.h (and update the callsite in WoQMatmul.cpp) with their C++ API equivalents for a consistent programming style across the XPU oneDNN integration layer.
Motivation
The existing code mixed oneDNN C API (dnnl_* functions, dnnl_exec_arg_t, const_dnnl_memory_desc_t, etc.) with the C++ API...