* add complex real op & api & unittest

* add imag op & api & unittest

* refactor op impl

* revert simplify writing due to complile failed

* polish details

* polish grad op code

* Sharding add hybrid-dp feature

* update sharding in distributed_strategy

* update sharding unitest

* revise code format for sharding

* Add the strategy of skipping cc/cu test compilation and execution in CI, test=develop

* fix if error with CI_SKIP_TEST, test=develop

* fix add properties to test error on Linux/MAC, test=develop

* fix set test properties of test_code_generator error, test=develop

* remove test codes and advance judgment of file modification on Linux, test=develop

* rename CI_SKIP_TEST to CI_SKIP_CPP_TEST, test=document_fix

* Add branch judgement on Linux, test=develop

* Add more value to calculate hash key

* fix size_t

* polish code

* added external reorder to profiler

* added external and internal reorders to profiler

* added internal and external reorder to profiler

* added formatting to int/ext reorder commit

* removed unnecessary comment

[inplace] Add ShareHolderWith for class Variable and SharePlaceholderWith in VarBase.detach() to share the same Tensor/SelectedRows (#29267)

* basic impl of type promote

* add comment & another testcase

* fix complex bugs & support python op promote type

* fix failed unittests & polish code

* add unittest for coverage

* change to only promote complex type

* polish code details

* polish several comments

* hot fix complle failed in gcc4.8

* fix failed unittest

* Fix a bug when running on an operating system without "bash."

* add execution condition

* for ci-coverage

* add complex64 and complex128 type; add +-*/@ and slice opreator for complex types

* add test cases for complex elementwise, matmul and getitem unittest

* add test cases for complex types

* add test cases for complex matmul unittest

* Add a class TensorInplaceVersion to count the inplace version and put it in framework::Tensor instead of Allocation or Variable.

* Add a new attribute `_inplace_version` for VarBase.

* Raise exception if an inplace operation can result in incorrect gradient computation.

* Add a new interface _bump_inplace_version() for VarBase to bump the version whenever the Tensor is modified through an inplace operation.

* For api assign, call _bump_inplace_version() when it's an inplace operation inn dynamic mode.

* Use original var_wrapper if the inplace_version is not changed.

* Replace SnapshotVarWrapperList with SnapshotVarWrapper to optimize performane.

* fix failed tests in yingchun gived list

* add unittests into static_mode_white_list

* add enable static

* fix dist unittest

* skip test_sigmoid_focal_loss_op & add gym

* revert no need skip unittests

* remove gym

add API serialize_program, serialize_persistables, save_to_file, deserialize_program, deserialize_persistables, load_from_file. (#29034)

* Add bf16 pool2d and unify bf16 unit tests

* Add change default ops test

* Fix cpu_bfloat16_pass

* Add output_format

* Fix incorrect SetOutput

* Change fromating

* default not show cpp statck & add hint

* fix failed unittest

* fix failed unittests

* Add multi_gru_fuse_pass and tests

* fix date

* cleaned up headers

* Add multi_gru_seq_fuse_pass and tests

* fix date

* removed unused functions

* update, test=develop

* ps gpu transpile

* ps gpu

* remove op

* gps trainer

* local ps

* add macro

* HeterBox

* def cuda

* tab

* code style

* style

Co-authored-by: Thunderbrook <a754913769#163.com>

* Add bf16 matmul, fc, elementwise add and mul

* Correct unit test

* use forward declarations for framework.pb.h, test=develop

* use forward declarations for framework.pb.h, test=develop