use uv instead of pip

.github/workflows/test_run.yml

@@ -43,10 +43,10 @@ jobs:
 
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip cython
+        python -m pip install --upgrade pip cython uv
         # This is to avoid installing cuda dependencies
-        python -m pip install torch torchaudio --index-url https://download.pytorch.org/whl/cpu
-        python -m pip install -c constraints.txt -r requirements.txt
+        uv pip install --system torch torchaudio --index-url https://download.pytorch.org/whl/cpu
+        uv pip install --system -c constraints.txt -r requirements.txt
 
     - name: Test running a file
       run: |