Torch build option change

Torch build option change to avoid build warning and error.

Author: sshonTT

.github/workflows/_build_torch_xla_3.11.yml

@@ -50,8 +50,8 @@ jobs:
           git clone --recursive https://github.com/tenstorrent/pytorch-xla.git xla
 
           # copy pre-built wheels from cache
-          python3.11 setup.py bdist_wheel
-          python3.11 setup.py develop
+          ATEN_AVX512_256=FALSE python3.11 setup.py bdist_wheel
+          ATEN_AVX512_256=FALSE python3.11 setup.py develop
 
           # Build PyTorch/XLA
           cd xla/