* add namespace and dataset file of falcon,add data download script of Mnist dataset

* add falcon_lenet test case

* add falcon_lenet.cc for lenet inference and output accuracy

* Fix falcon lenet low predict accuracy problem.

* add primihub.yaml about falcon

* Fix compile error after merge change from develop.

* Fix build error in macos.

* Enable aby3, crypTFlow2, falcon's algorithm test.

* Let bazel output test message into stderr to help debug error.

* Try to resolve file not found error in logistic test.

* Revert python3 link flags and fix syntax error in main.yaml.

* Use checkout@v3 to download all file in primihub, this may help to solve the file not found error.

* Debug file not found error in github action.

* Fix syntax error in workflow.

* Fix typo.

* Update main.yml

Fix main.yml test on mac_x86

* Fix bazel test error in macos platform.
Co-authored-by: Nzhangxiangyu <zhangxiangyu@primihub.com>
Co-authored-by: hobo0cn <hobo0cn@gmail.com>