Improve orttrainer test (#779)
* Redefine models & tasks
* label workflow
* Add triigers to gpu test
* Add pr triggers test trainer test
* Fix typo
* Workflow done
* Workflow done
* Test another thing in workflow
* Refactoring ORTTrainer test
* comment bf16 tests
* Let all irrelevant tests skip
* skip when needs skipped
* let me also do it for training
* fix training args not passed
* Update workflow
* Fix without label smoother
* fix format
* Add dependency
* Exclude trainer from regular test
* Fix test path
* rename test file to avoid pytest check
* refactor workflow trainer
* move docker to folder
