copy python2 setup from cython

.github/workflows/ci.yml

@@ -322,10 +322,16 @@ jobs:
     #   parameters:
     #     pythonVersion: "2.7"
 
-      - name: Set up Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '2.7'
+      - name: Set up Python2
+        # Copied from cython's ci.yml
+        run: |
+            sudo ln -fs python2 /usr/bin/python
+            sudo apt-get update
+            sudo apt-get install python-setuptools python2.7 python2.7-dev
+            curl https://bootstrap.pypa.io/pip/2.7/get-pip.py --output get-pip.py
+            sudo python2 get-pip.py
+            ls -l /usr/bin/pip* /usr/local/bin/pip*
+            which pip
 
       - name: Install/Upgrade Python dependencies
         run: python -m pip install --upgrade pip wheel