flash attn pip install (#426)

* flash attn pip

* add packaging

* add packaging to apt get

* install flash attn in dockerfile

* remove unused whls

* add wheel

* clean up pr

fix packaging requirement for ci
upgrade pip for ci
skip build isolation for requiremnents to get flash-attn working
install flash-attn seperately

* install wheel for ci

* no flash-attn for basic cicd

* install flash-attn as pip extras

---------

Co-authored-by: Ubuntu <mgh@mgh-vm.wsyvwcia0jxedeyrchqg425tpb.ax.internal.cloudapp.net>
Co-authored-by: mhenrichsen <some_email@hey.com>
Co-authored-by: Mads Henrichsen <mads@BrbartiendeMads.lan>
Co-authored-by: Wing Lian <wing.lian@gmail.com>

requirements.txt

@@ -6,6 +6,7 @@ addict
 fire
 PyYAML==6.0
 datasets
+flash-attn==2.0.8
 sentencepiece
 wandb
 einops