* fix save_dygraph with nonexistent dir
test=develop

* minor fix
test=develop

* fix unittest
test=develop

* fix static save
test=develop

* fix compile issue, test=develop

* force link libiomp5 when mklml is enabled, test=develop

enhanced ops: concat, nearest_interp, deformable_conv_v1, sequence_conv, transpose2, conv2d

* remove the useless third_party library from C++ inference library

* revert removing the install directory

* refine code, test=develop

* reuse contain_var, test=develop

* add all_parameters for Program, test=develop

* refine unittest, test=develop

* add example print result, test=develop

faster build by reduce by-product, reduce linking library and fix compile warning of std=c++11 (#22164)

This reverts commit c7b03d30.

* add collective communication library in fleet to replace mpi
* test=develop

* add ci approvals for dygraph optest, test=develop

* Add error message, test=develop, test=document_fix

* Increase the number of approves of CI check for dygraph optest, test=develop, test=document_fix

* add ci approvals for dygraph optest, test=develop

* polish code style, test=develop, test=document_fix

* remove ci-check trigger example, test=develop, test=document_fix

- fluid和lite精度比较替换为相对误差

* test=develop, bug fix for sparse recorder

* polish error message of parallel executor, test=develop

* change PADDLE_ENFORCE, test=develop

* add parameter check; test=develop

* change parameter name checker in dygraph guard; test=develop

* fix test layers error; test=develop

* revert some code to develop; test=develop

* fix exampel error; test=develop

* fix comment error; test=develop

* fix comment error; test=develop

- 添加了fluid-lite子图方式运行resnet的单测
- 修改了依赖Lite的git commit id

* add NotImplementedError for multi optimizers used on multi-places . test=develop

* assert error only if num_devices>1. test=develop

* set test_optimizer_in_control_flow in CMakeLists for using multi-GPU.test=develop

* fix the bug of profile update test=develop

* add backward gradient computation for op argsort test=developo

* use pre-commit test=develop

* add bn and relu fuse pass

* add op attr assert and dtype assert

* fix some inputs&&outputs bugs for the fused op and pattern.

* add the unittest for fuse_bn_act_pass. test=develop

* use normative enforce statements. test=develop

* add the cpu test. test=develop

* add the support of batch_size=1 for the bn with relu op. test=develop

* add the error type for paddle throws. test=develop

* add fused_batch_norm_act and fused_batch_norm_act_grad to op_has_unsed_vars_white_list. test=develop