[WIP] implement rest of the test cases (LoRA tests) (#2824)
* inital commit for lora test cases
* help a bit with lora for 3d
* fixed lora tests
* replaced redundant code
---------
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
