Integrate "Free disk space" steps into unit tests (#7635)

This resolves the 'no space left on device' error in the tests.

Author: nikelite

.github/workflows/ci-test.yml

@@ -29,6 +29,17 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
+    - name: Free Disk Space (Ubuntu)
+      uses: jlumbroso/free-disk-space@main
+      with:
+        tool-cache: false
+        android: true
+        dotnet: true
+        haskell: true
+        large-packages: false
+        docker-images: true
+        swap-storage: true
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
@@ -50,7 +61,7 @@ jobs:
 
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip wheel
+        python -m pip install --upgrade pip wheel setuptools
         # TODO(b/232490018): Cython need to be installed separately to build pycocotools.
         python -m pip install Cython -c ./test_constraints.txt
         pip install \