[SYCL][NATIVECPU] Refactor from PI plugin to UR adapter (#10523)

This PR refactors the current SYCL Native CPU Implementation as a
Unified Runtime adapter.
No new functionalities are added.

Contents of this PR:
- Native CPU implementation divided in multiple source files at
`sycl/plugins/unified_runtime/ur/adapters/native_cpu`
- Native CPU PI plugin is now implemented through the `pi2ur.hpp`
interface
- _pi_* classes have now an equivalent ur_* class
- `UR_PLATFORM_BACKEND_NATIVE_CPU` value added to
`ur2piPlatformInfoValue`

Author: Alcpz

sycl/plugins/native_cpu/CMakeLists.txt

@@ -1,8 +1,36 @@
 add_sycl_plugin(native_cpu
   SOURCES
-    pi_native_cpu.cpp
+    "pi_native_cpu.cpp"
+    "../unified_runtime/pi2ur.hpp"
+    "../unified_runtime/pi2ur.cpp"
+    "../unified_runtime/ur/ur.hpp"
+    "../unified_runtime/ur/ur.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/common.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/common.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/context.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/context.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/device.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/device.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/enqueue.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/event.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/kernel.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/kernel.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/memory.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/memory.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/platform.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/platform.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/program.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/program.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/queue.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/queue.hpp"
+    "../unified_runtime/ur/adapters/native_cpu/sampler.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/runtime.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/ur_interface_loader.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/usm.cpp"
+    "../unified_runtime/ur/adapters/native_cpu/usm_p2p.cpp"
   INCLUDE_DIRS
-    ${CMAKE_CURRENT_SOURCE_DIR} 
+    ${CMAKE_CURRENT_SOURCE_DIR}/../unified_runtime
   LIBRARIES
     sycl
+    UnifiedRuntime-Headers
 )