Tests: upgrade PyTorch cuda to 11.7 to fix examples tests. (#1048)

Tests: upgrade PyTorch cuda to 11.7.

Otherwise the cuda versions of torch and torchvision mismatch, and
examples tests fail. We were requesting cuda 11.6 for PyTorch, and the
default torchvision (via setup.py).

Another option would be to include torchvision in the same pip install
line as torch.

.github/workflows/push_tests.yml

@@ -34,7 +34,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip uninstall -y torch torchvision torchtext
-        python -m pip install torch --extra-index-url https://download.pytorch.org/whl/cu116
+        python -m pip install torch --extra-index-url https://download.pytorch.org/whl/cu117
         python -m pip install -e .[quality,test]
         python -m pip install git+https://github.com/huggingface/accelerate
 
@@ -80,7 +80,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip uninstall -y torch torchvision torchtext
-        python -m pip install torch --extra-index-url https://download.pytorch.org/whl/cu116
+        python -m pip install torch --extra-index-url https://download.pytorch.org/whl/cu117
         python -m pip install -e .[quality,test,training]
         python -m pip install git+https://github.com/huggingface/accelerate