add e2e tests for Unsloth qlora and test the builds (#2093)

* see if unsloth installs cleanly in ci

* check unsloth install on regular tests, not sdist

* fix ampere check exception for ci

* use cached_property instead

* add an e2e test for unsloth qlora

* reduce seq len and mbsz to prevent oom in ci

* add checks for fp16 and sdp_attention

* pin unsloth to a specific release

* add unsloth to docker image too

* fix flash attn xentropy patch

* fix loss, add check for loss when using fa_xentropy

* fix special tokens for test

* typo

* test fa xentropy with and without gradient accum

* pr feedback changes

docker/Dockerfile

@@ -26,6 +26,8 @@ RUN if [ "$AXOLOTL_EXTRAS" != "" ] ; then \
         pip install -e .[deepspeed,flash-attn,optimizers] $AXOLOTL_ARGS; \
     fi
 
+RUN python scripts/unsloth_install.py | sh
+
 # So we can test the Docker image
 RUN pip install pytest