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* add unique_v2 op

* remove unique_v2 op

* update doc

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* Enhance affine grid operator:
1. Add cuda kernel
2. Add align corners options
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* Move new affine_grid api to functional
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* Add CUDA kernel for affine_grid.
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* Add more unitest for grid sample API
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This PR enhance CPU kernel and add new CUDA kernel to make grid_sample support:

- align_corners: with bool type.
- padding mode: which can be in ['zeros', 'reflect', 'border']
- Interpolation mode: which ca be in ['bilinear', 'nearest']

The old CPU and CUDNN version only support align_corners=true, padding_mode='zeros' and interpolation_mode='bilinear'.

The behavior of the new version op in default mode is compatible with the old version.

change to use bce_loss op, add numel check for bce_loss.

* add div, floor_div, remainder

add the isnan, isfinite, isinf api for the paddle 2.0

* add the new api and op for the argmax, argmin

* update conv_transpose api

add paddle.tensor.linalg.diag API, diag_v2 OP and CUDA kernel.

* add matmul_v2

* add bernoulli op

* fix cuda kernel and add unit test

* refine doc

* fix uniform

* Add mechanism for blocking oneDNN cache clearing

* Review changes and Add thread guards

* add error message

* 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

* mod cvm test=develop

* mod code format test=develop

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