* batch of refactored tests

* more test refactoring

* fp16 test refactor

* more refactors

* added DistributedFixture class

* applied DistributedFixture to first batch of tests as a trial

* added DistributedFixture test and documentation

* last tests

* fixes for refactored tests

* remove subdirs in workflow files

* fix pytest syntax error

* fix another syntax error

* update imports

* use DistFixture with elastic checkpoint test

* missing import

* update to shared class tmpdir for elastic test

* moved test files

* avoid duplicate test file name

* last refactor and moving test files

* formatting

* fix broken import

* testing forked AMD tests

* update abstract method

* use blob storage for accelerate and transformers tests

* upgrade torch for acclerate CI
Co-authored-by: NOlatunji Ruwase <olruwase@microsoft.com>