move distribution.py into distribution package and split into different file for better scalability (#38047)

* First set of fixes

* - Make more likely to GetBlob find a blobs

* - Lint

* block warning when build demo_ci and infer_ut

* use build pipe line clone to test

* add control/status API, test=develop

* fix import error, test=develop

* add is_grad_enabled unittest, test=develop

* add code comment for example code and API, test=develop

* add checking for type, test=develop

* add api description, test=develop

* fix docs index_en, test=document_fix

* fix doc of is_floating_point, test=document_fix

add mem pool

* add erfinv API, test=develop

* fix gradient accuracy error, test=develop

* fix cuda compilation error on Windows, test=develop

* fix M_2_SQRTPI undeclared identifier on Windows, test=develop

* add align for WorkQueue

* add spinlock

* merge develop

* merge

* Add EventsWaiter

* Revert "Add EventsWaiter"

This reverts commit e206173aa9be7401b83a53581627bfaf557c8fb2.

* update EventsWater

* fix

* split workqueue files

* add more tests

* fix

* bugfix

* bugfix

* update
Co-authored-by: Nliutiexing <liutiexing@google.com>

* add empty and empty_like kernel in pten

* add empty dev_api

* support external stream.

* update

* update

* update

* add mkldnn conv_elementwise_add_mkldnn_fuse_pass ut

* update mkldnn conv_elementwise_add_mkldnn_fuse_pass ut

* update conv_elementwise_add_mkldnn_fuse_pass ut

* update conv_elementwise_add_mkldnn_fuse_pass ut

* update conv_elementwise_add_mkldnn_fuse_pass ut

* restrict conv2d data_format in conv_elementwise_add_mkldnn_fuse_pass

* update conv_elementwise_add_mkldnn_fuse_pass OpCompat

* update conv_elementwise_add_mkldnn_fuse_pass ut

* update ut

* add new API: paddle.clone;Tensor.element_size;nn.utils.parameters_to_vector

* fix comment

* add flatten2_matmul squeeze2_matmul reshape2_matmul test case

* modify skip func to ignore_pass_case func

* rebuild CI

* add test_xx_matmul_fuse_pass timeout

* add test_map_xx_pass timeout

* add max_duration of test cast

* add trt skip

* add timeout

* del commented code

* move dot kernel impl

* remove needless cmake items

* updates the pten allocation, test=develop

* avoids an error message, test=develop

* optimize gelu backward

* optimize gelu backward

* optimize code

* Number to expression

* Replacement number

* test if numpy=1.19.5 meet unittest's requirement

* modify numpy version required

* fix merged_momentum regular bug

* fix bug

* change functions to funcs

* remove useless code

* add pten kernel cmake

* add pten kernel cmake function

* fix compile error

* add enforce include for full kernel

* fix compile failed

* change cuda to gpu

* fix cmake function error

* add mkldnn reshape_transpose_matmul fuse pass ut and op version check

* update reshape_transpose_matmul_mkldnn_fuse_pass ut

* update ut

* update mkldnn batch_norm_activation fuse pass ut

* update ut

* update mkldnn batch_norm_act_fuse_pass ut

* update batch_norm_act_fuse_pass ut

* update ut

* move flatten

* fix bugs of test

* modify header file

* add copy declare

* fix compile bugs

* rename full infer_meta

* fix merge problem