test=develop

* Enable ngraph tests for a ngraph engine
test=develop

* Move the test structure to other place
test=develop

* Add USE_NGRAPH flag, simple structure
test=develop

* enable test_gradient_clip in mac
test=develop

* refine test_gradient_clip
test=develop

* test dist ut fixes test=develop

* fix cmake

* for test

* expose square
test=develop

* fix activation
test=develop

* Add square API
test=develop

* add necessary op

* code refine

* fix API.spec
test=develop

* fix unit test
test=develop

* add unit test sparse_grad_clip
test=develop

* fix API.spec
test=develop

* remove mac test for test_gradient_clip
test=develop

* remove selectedrows_mul_tensor
test=develop

test=develop

test=develop

test=develop

test=develop

test=develop

test=develop

Fix transformer unittest

* parallel run dist ci

* test=develop

* update test=develop

- add naive executor
- fix concurrency performance issue

Add warning when disable test_fuse_elewise_add_act_pass on Mac