* add timeout unittests retry

* modifed parameter use

* Restore file changes caused by pre-commit and test it, test=document_fix

* Change argument of checkout, test=document_fix

* Remove test code, test=document_fix

* add retry on mac

* fix some error

* fix with some errors

* add failed unittests retry on win system

* modified the value of retry times

* Modify data download function, and support unittests of inference APIs on windows, test=develop

* The import error compatible with py2 and py3, and fix unittests problems of inference APIs on Windows, test=develop

show unittest time even if unittest failed

* Show more possible problems with build_and_check in file paddle_build.sh, test=develop

* Remove test codes modified in file device.py for build_and_check, test=document_fix

* Fix missing blank space in file device.py, test=document_fix

* Final process via summary_check_problems function, test=document_fix

* turn on WITH_INFERENCE_API_TEST

* Count the time and packet size on windows

* fix conflit

* fix conflit

* fix conflit

* fix date-time funciton

* Add the option to execute unit tests only at night

* set ut nightly label for 3 cases.

set default python3,fix incompatible,cache dir for third party,unify error code,for windows (#26178)

* set default python3 for paddle windows,test=win

* set default python3,cache dir for third party,error code,test=win

* fix some incompatible

* fix some error

* set virtual environment,test=win

* add unittest for paddlerolemaker with gloo

* Fix inference bug

* fix inference lib

* Fixed compile warning about incorrect compile options,fix paddle_build.bat

* fix paddle_build.bat to more safe

* add fleetrun command for distributed running; test=develop

* add ci check for changing op-related api without core.ops, test=develop

* generate api_source_md5 file when build, test=develop

* add failed example, test=develop

* add failed example, test=develop

* handle exception, test=develop

windows CI scripts for xly