roundup_power2_divisions not needed with newer pytorch versions (#3540)

* roundup_power2_divisions not needed with newer pytorch versions

* remove typo

* update qwen3.5 moe 35b-a3b yaml for 5090

* more bug fixes

* fix tests to match updated trainer

* don't use fa2 for hooks test

* reset plugins on the instance

* retry download

* fix references to renamed axolotl_cfg property on trainer

* Fix ref to trainer cfg

tests/integrations/test_diffusion_callback.py

@@ -13,7 +13,7 @@ class DummyTrainer:
 
     def __init__(self, use_eval: bool):
         # Config used by callback
-        self.cfg = SimpleNamespace(
+        self.axolotl_cfg = SimpleNamespace(
             diffusion=SimpleNamespace(
                 generation_interval=1,
                 num_generation_samples=1,