[XPU] [DeepNVMe] use same cpu_op_desc_t with cuda (#6645)

We have found that #6592 uses `_pinned_tensor_mgr` to create cpu bounce
buffer, which is same with what our xpu accelerator currently doing.
So no need to use xpu device specific cpu_op_desc_t.
In this PR:
1. remove custom csrc/xpu/aio/deepspeed_cpu_op.cpp
2. modify xpu async_io opbuilder.

This issue cannot be easily done with revert #6532 , for we added some
source file as last time GDS feature going in DS. So file this new PR :)

op_builder/xpu/async_io.py

@@ -31,7 +31,7 @@ def sources(self):
             'csrc/aio/common/deepspeed_aio_types.cpp',
             'csrc/aio/py_lib/deepspeed_pin_tensor.cpp',
             'csrc/aio/py_lib/deepspeed_py_io_handle.cpp',
-            'csrc/xpu/aio/deepspeed_cpu_op.cpp',
+            'csrc/aio/py_lib/deepspeed_cpu_op.cpp',
             'csrc/aio/py_lib/deepspeed_aio_op_desc.cpp',
         ]