GitLab

* `gpt2` sdpa support

* fix (at least) one test, style, repo consistency

* fix sdpa mask in forward --> fixes generation

* test

* test2

* test3

* test4

* simplify shapes for attn mask creation and small comments

* hub fail test

* benchmarks

* flash attn 2 mask should not be inverted on enc-dec setup

* fix comment

* apply some suggestion from code review

- only save _attn_implentation once
- remove unnecessary comment

* change elif logic

* [run-slow] gpt2

* modify `test_gpt2_sample_max_time` to follow previous assertion patterns