[SYCL] [NATIVECPU] Remove dependencies to sycl in UR adapter (#11685)
This PR removes dependencies to the sycl headers/library in the Native
CPU UR adapter.
`sycl/include/sycl/detail/native_cpu.hpp` has been moved to
`sycl/plugins/unified_runtime/ur/adapters/native_cpu/nativecpu_state.hpp`,
and the definitions of work item builtins has been moved from that
header to the compiler, which now emits them in the
`PrepareSYCLNativeCPUPass`.