pin pytorch in test script - 2.9 taking too much space

Author: pgleeson

.github/workflows/ci_test_all.yml

@@ -37,6 +37,7 @@ jobs:
 
     - name: Run test script
       run: |
+        pip install torch==2.8.0 # pinned to avoid issues with latest version taking up too much space...
         export NEURON_HOME=$pythonLocation
         ./test_all.sh