* Fix bug of reduce_sum op. When input.numel() > INT32_MAX, its result
is wrong.

* Remove climits.

* Clean fluid API in paddle/distributed and paddle/fleetx folders.
Include following files:
python/paddle/distributed/__init__.py
python/paddle/distributed/collective.py
python/paddle/distributed/fleet/utils/fs.py
python/paddle/distributed/fleet/utils/hybrid_parallel_inference.py
python/paddle/distributed/fleet/utils/hybrid_parallel_util.py
python/paddle/distributed/fleet/utils/internal_storage.py
python/paddle/distributed/launch/context/device.py
python/paddle/distributed/parallel.py
python/paddle/distributed/parallel_with_gloo.py
python/paddle/distributed/spawn.py
python/paddle/framework/__init__.py
To be mentioned, 'paddle.fluid.dygraph.parallel.ParallelEnv'
 and 'fluid.framework.core' keeps unchanged in those files.
ParallelEnv is used by paddle.fluid.dygraph.parallel.DataParallel.
However, APIs in paddle.fluid.dygraph.parallel can't be
migrated to paddle.distributed, as there exists cyclic import
dependencies in modules like paddle.static, paddle.tensor. And
'fluid.framework.core' will be changed to import framework.core
after fluid.core is transmitted.

* Change TODO authors.

* [API Clean]Clean __all__ to avoid exposing usless API

* fix import

* fix typo

* remove tracedLayer unittest

* add onehot trt converter

* add unitest

* fix bug

* opt code

* fix bug

* fix depth_tensor

* fix unitest

* fix bug

* fix unitest

* fix bug

* fix bug

* fix bug

* fix bug

* Merge branch 'reduce_sum' of https://github.com/GhostScreaming/Paddle into mine_fluid_clean_common.

* Fix some bugs.

* Clean APIs in python/paddle/fluid/layers/control_flow.py

* Polish code style.

* Change API.

* Fix some bugs.

* Fix some bugs.

Remove fluid dygrah apis
GroupNorm
TreeConv
Move fluid dygraph apis
Flatten
SpectralNorm

* [CodeStyle][F811] fix some unittests

* fix setup.py

* remove ignore from flake8 config

* remove repeat TestAbsDoubleGradCheck

* fix rrelu test

* fix fft ut

* add noqa in fluid.lstm ut

* add rtol and atol in test_matmul_v2_op

* update rtol

* empty commit

* empty commit

* revert changes in matmul ut and add noqa

* rename test case name

[Fluid Clean]move inplace_apis_indygraph_only from paddle.flud.dygraph.inplace_utils to paddle.utils (#48744)

* move inplace_apis_indygraph_only from paddle.flud.dygraph.inplace_utils to paddle.utils

* modify conflict

* modify conflict

* modify conflict

* modify conflict

* modify conflict

* modify conflict

* modify conflict

* modify static-check ci error

* fix conflict

* modify failed tests

* fix conflict

* fix conflict

* fix pool2d examples

* modify conflict

* fix failed tests

* fix conflict

* fix failed tests

* modfiy problem of deleting pool2d

* remove paddle.fluid.layers.nn.temporal_shift

* code check

* rm unittest

* remove fluid.yolo_box

* remove fluid.yolov3_loss

* change the comments of yolov3_loss to yolo_loss

* 修改paddle.nn.dynamic_decode，paddle.nn.functional.diag_embed 示例

* mma qk tensor_core (#48087)

* use mma for QK dot computing in fused_multi_transformer.
* Update fused_multi_transformer_op.cu.h

* remove lrn which is not used in paddle 2.0 (#47945)

* replace scatter_nd and scatter_nd_add with paddle.scatter_nd and (#47960)

paddle.scatter_nd_add

* [PHI] Migrate mul_grad kernel (#48061)

* cleanup unused code

* unify is_int8 is_bfloat16

* Simplify matmul_v2 FWD kernel

* remove RunKernel methods

* remove import namespace

* remove headers

* clean fluid/phi cross imports

* remove fluid axpy_handler

* delete fluid methods

* activations

* OneDNNMemDesc

* MKLDNNFormatForSize

* MatchShapeToLayout

* MKLDNNMemoryFormat

* MKLDNNFormat

* ReorderMKLDNNHandler

* to_void_cast

* review suggestions

* interpolate

* remove fluid depedency

* init

* ExecuteMatMulV2

* rm fluid kernel

* matmul_grad

* remove mutable_data

* mul_grad

* delete unnecessary shape and slice op (#48112)

* 修改英文文档。

* 修改segment operator等英文文档。

* 重新修改了paddle.einsum，paddle.unique_consecutive，
paddle.disable_signal_handler的英文文档格式。

* 重新修改了英文文档格式。;test=docs_preview

* Update extension.py

* 重新修改了英文文档格式。;test=docs_preview

* 重新修改了英文文档格式。
待验收：
- paddle.linalg.svd
- paddle.nn.functional.diag_embed
- paddle.set_grad_enabled
- paddle.disable_signal_handler
- paddle.cumprod
- paddle.devaice.cuda.stream_guard

待修改：
- paddle.nn.dynamic_decode
- paddle.einsum
- paddle.unique_consecutive
- paddle.linalg.svd
- paddle.uncubate.segment_min
- paddle.uncubate.segment_max
- paddle.uncubate.segment_sum
- paddle.uncubate.segment_mean

;test=docs_preview

* 重新修改了英文文档格式。
待验收：
- paddle.linalg.svd
- paddle.nn.functional.diag_embed
- paddle.set_grad_enabled
- paddle.disable_signal_handler
- paddle.cumprod
- paddle.devaice.cuda.stream_guard
- paddle.nn.dynamic_decode
- paddle.unique_consecutive
- paddle.linalg.svd

待修改：
- paddle.einsum
- paddle.incubate.segment_min
- paddle.incubate.segment_max
- paddle.incubate.segment_sum
- paddle.incubate.segment_mean

;test=docs_preview

* 重新修改了英文文档格式。
待验收：
- paddle.linalg.svd
- paddle.nn.functional.diag_embed
- paddle.set_grad_enabled
- paddle.disable_signal_handler
- paddle.cumprod
- paddle.devaice.cuda.stream_guard
- paddle.nn.dynamic_decode
- paddle.unique_consecutive
- paddle.linalg.svd

待修改：
- paddle.einsum
- paddle.incubate.segment_min
- paddle.incubate.segment_max
- paddle.incubate.segment_sum
- paddle.incubate.segment_mean

;test=docs_preview

* update

* test=docs_preview

* update formula; test=docs_preview

* update formula; test=docs_preview

* remove this operator; test=docs_preview

* add hyper link; test=docs_preview

* add default value; test=docs_preview

* update format; test=docs_preview

* empty commit; test=docs_preview

* fix codestyle issues; test=docs_preview

* empty commit; test=docs_preview
Co-authored-by: Nlzy <569782149@qq.com>
Co-authored-by: NVvsmile <450864116@qq.com>
Co-authored-by: NSławomir Siwek <slawomir.siwek@intel.com>
Co-authored-by: NRichardWooSJTU <37864677+RichardWooSJTU@users.noreply.github.com>
Co-authored-by: NLigoml <39876205+Ligoml@users.noreply.github.com>
Co-authored-by: NNyakku Shigure <sigure.qaq@gmail.com>

* [remove fluid] PRelu BilinearTensorProduct

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* [remove fluid] PRelu BilinearTensorProduct Conv2DTranspose SequenceConv RowConv

* modify slice infershape

* code style

* modify slice_unittest

* temp fix

* batch_norm api move

* code_style

* codestyle

* ci_static

* add __init__

* reset other change

* revert .cc

* add import batchnorm

* conflict and revert

* fix bug

* fix third conflict one day

* fix conflict

* fix conflict bug

* fix conflict bug

* modify api

* code_style

* modify doc

* add lost doc stable

* fix conflict bug

* ci lack of gpu

* [Zero-Dim] Support 0D for paddle.diagflat

*test=kunlun

* delete Bias and ResidualData in OpMaker of conv2d

* delete extra input of conv3d

* refactor pass of conv_bias_fusion

* fix mkldnn dependency

* fix mkldnn compile

* fix test_conv_bias_mkldnn_fuse_pass

* police some code

* remove useless log

* fix analyzer_vit_ocr_tester

* fix conv_activation_mkldnn_fuse_pass

* fix test_analyzer_ocr

* add fused_conv_sig

* fix performence regression

* fix performance regression

* [CodeStyle][isort][Dy2St] sort imports in test_error

* update lineno

* remove layers.matmul in nets.py

* remove layers.matmul in rnn_impl/test_quantization_pass/auto_parallel_gpt_model/test_auto_parallel_completion_gpt

* remove layers.matmul in other files

* fix

* fix

* remove layers.matmul itself

* remove ref in CMakeLists.txt and tools directory

* remove matmul in fluid.layers.nn.py

* remove matmul in fluid.dygraph.rnn.py && resotre test_matmul_op.py

* replace matmul in fluid.dygraph.rnn.py && clean api_test in test_matmul_op.py

* fix error && restore empty test_auto_search_dist_matmul_op.py

* fix check in test_auto_parallel_partitioner.py

* fix test_dist_matmul && test_flags_mkldnn_ops_on_off

* fix test_fused_attention_op_xpu.py && test_matmul_op_xpu.py

* remove test_auto_search_dist_matmul_op.py

* remove layers.matmul in auto_parallel_gpt_model.py && fix doc in fluid/io.py

* fix for matmul_grad

* fix codestyle

* fix codestyle

* resolve conflicts error

* restore unit test file but not compiled it for later remove

* fix codestyle

* fix wrong unittest skip

* fix unittest delete

* fix scale cost

* fix scale cost

* resolve conflicts error

* resolve conflicts error
Co-authored-by: Njakpiase <jakpia21@gmail.com>

[fluid remove]: remove paddle.fluid.layers.target_assign, paddle.fluid.layers.rpn_target_assign, paddle.fluid.layers.retinanet_target_assign and paddle.fluid.layers.ssd_loss (#48669)

* remove paddle.fluid.layers.nn.temporal_shift

* code check

* rm unittest

* remove ssd_loss, target_assigns

* remove target_assign, retinanet_target_assign, rpn_target_assign and ssd_loss

* rm _disable_legacy_dygraph

* disable test_flags_mkldnn_ops_on_off test

* add reduce max for trt

* add stat tool

* add roll and roll_grad kernels and strided_slice and strided_slice_grad kernels, test=kunlun

* add xpu rmsprop centered, test=kunlun

* [remove fluid] GRUUnit NCE

* [remove fluid] GRUUnit NCE

* [remove fluid] GRUUnit NCE

* [remove fluid] GRUUnit NCE