Add flow xxx and tensor xxx autotest (#5386)

* add argmax test

* fix ci error

* fix docstring warning

* fix tensor greater and less bug

* fix conflict

* add test_flow_xxx_against_pytorch func

* add test_flow_tensor_xxx_against_pytorch func

* add test

* fix first comments

* code reuse

* fix comments

* fix comments

* fix conv test bug

* fix conv test bug

* fix comments

* fix comment

* fix comment

* fix comment

* fix comment

* fix bug

* fix comment

* fix comment

* fix comments

* fix comments

* fix comments

* fix comments

* fix comments

* code format

* refine autotest

* fix comments

* fix comments

* fix comment

Co-authored-by: oneflow-ci-bot <69100618+oneflow-ci-bot@users.noreply.github.com>