* add summary_env, test=develop

* update issue template, test=develop

* refine link, test=develop
Co-authored-by: Nroot <root@yq01-gpu-255-129-15-00.epc.baidu.com>

* enable load_program_state run in imperative mode; test=develop

* remove useless code; test=develop

[Dy2Static]Convert var.shape stmt and Convert the return variables of Tensor-dependent 'if' staments to Tensor if it not  (#24911)

* Support int and long: int or long -> six.integer_types. 

* Modify test_tensor_shape: fix bug and modify comment. 

* Support convert_var_shape to convert var.shape stmt

* Modify code in ifelse_simple_func.py because don't support return non-Tensor in Tensor-dependent 'if' stament currently. 

* Convert the return variables of Tensor-dependent 'if' staments to Tensor if it not. test=develop

* use allow list instead of white list, test=develop

* reduce include, test=develop

Support CMatchAucCalculator based on CMatchRankAucCalculator with a new parameter ignore_rank

[Dy2stat] decrease the batch size to decrease GPU usage.

* windows publish package scripts,test=develop

* windows publish package scripts,test=develop

* windows publish package scripts,test=develop

fix bug in CUDA_NVCC_FALS and CMAKE_CUDA_FLAGS

* test=develop, add log message in the function UpdateDllFlag

* test=develop, add the test

* remove gmock from ut

test=develop

* coverage enabled for r+t+m fuse pass

test=develop

* Move function 'convert_len' to file convert_operators.py 

* Support that for statements are transformed to while statements.

* Fix bug: raise None -> return None. 

* Support variable loaded and created in loop.

* Use int64 in Py2 and Py3 in function to_static_variable.

Fix the bug for elementwise_div op, when the first var is scalar; Use the shape 1 replace the -1 in shape.

[Dy2stat] Add word2vec as unittest

Add the support the 5d,6d tensor support for the reduce ops;
Add the same time, the compile time, it was 22 minutes, it was 21 minutes after fixed.

test=develop

* modify coverage gcc48 and gcc8 dockerfile trt's url, add gcc8 dockerfile pip tuna source,test=develop,test=document_fix

* delete pip tuna source,test=develop,test=document_fix

* add openmpi's description,test=develop,test=document_fix

test=develop

* add -DPADDLE_CUDA_BINVER. test=develop, test=win_gpu

* nvcc will use add_compile_options, avoid using it if you don't want to pass arguments to nvcc. test=develop

* test=develop, test=win_gpu

fixes the CUDAPlace info in the Print op

* Support LoDTensorArray in reverse_op test=develop

* polish en doc and unittest code test=develop

* refine sample code test=develop

* add example of LoDTensorArray test=develop

* fix typo test=develop

* refine err_msg of pybind.cc, test=develop

* refine err_msg in tensor_py.h, test=develop

* refine error msg, test=develop

* fix test_exception, test=develop

* follow comments, test=develop

* refine isfinite, test=develop

* use namespace std of isfinite, test=develop, test=win_gpu

* cast var in convert_logical_XX. 

* Add convert_ifelse function in convert_operators.py  

* Add logical_transformer. Remove LogicalTransformer from loop_transformer.py 

* Revert modified tests in PR24799(convert_while_stmt). 

* Comment and modify code that doesn't support `return` statement. 

* Remove unnecessary class: MergeAssignTransformer, NodeTestTransformer and IfConditionVisitor in ifelse_transformer. 

* support selectedrows allreduce in multi-cards dygraph, test=develop

* remove useless import modules in unittests, test=develop

* add nccl cmake to get nccl version, test=develop

* add if-condition to compiled correctly, test=develop

* add detail version parseing for old nccl, test=develop

* polish camke details, test=develop

* fix remove test cmake error, test=develop

* fix cmake condition, test=develop

* change unittest camke list, test=develop

* fix unittest cmake rule, test=develop, test=framep0