some legacy code still use xpu_wait() for stream sync -- it only syncs
default stream. this PR replaces them with dev_ctx.Wait() to ensure
that correct stream is always used

* add xpu buffer_reader, *test=kunlun

* xpu buffer_reader, use XPUDeviceGuard, *test=kunlun

* modify xpu.cmake, *test=kunlun

* modify xpu.cmake, *test=kunlun

* modify xpu.cmake, *test=kunlun

* add xpu buffer_reader, *test=kunlun

* add xpu buffer reader, *test=kunlun

* add xpu buffer reader, *test=kunlun

* update xpu depends
*test=kunlun

* minor
*test=kunlun
Co-authored-by: Nroot <root@yq01-sys-hic-p40-0091.yq01.baidu.com>

* rename pten dir to phi

* rename namespace to phi

* rename infrt pten dir to phi

* resolve conflict

* rename pten to phi in cmake

* revert all infrt change

* change needed files

* fix infrt failed

* fix inference failed

* [XPU] Reorganize xpu device codes in platform, test=develop

* fix xpu_header.h, test=develop

* make flag setter easier

* update

* rename macro name

* fix bug of public/writable

* update to pass CI

* polish

* fix CPU link error

* support Kunlun2

* support KL2

* support KL2

* support Baidu AI Accelerator
  * test=kunlun

* minor
 * test=kunlun

* support xpu op in separate file
 * test=kunlun

* update XPU error message and remove duplicated code

 * test=kunlun

* minor
 * test=kunlun

* minor
 * test=kunlun