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>

README.md

@@ -69,7 +69,7 @@ Get started with Axolotl in just a few steps! This quickstart guide will walk yo
 ```bash
 git clone https://github.com/OpenAccess-AI-Collective/axolotl
 
-pip3 install -e .
+pip3 install -e .[flash-attn]
 pip3 install -U git+https://github.com/huggingface/peft.git
 
 # finetune lora