message: Python setup: Fix URL for Python 2.7 pip install
  This URL changed upstream. Fix it by using the same upstream URL as the LGTM Python image.
  We can revisit separately whether to drop the Python 2 pip installation entirely.
diff: @@ -31,7 +31,7 @@ python3 -m pip install --user pipenv
  if command -v python2 &> /dev/null; then
  # Setup Python 2 dependency installation tools.
  # The Ubuntu 20.04 GHA environment does not come with a Python 2 pip
  - curl --location --fail https://bootstrap.pypa.io/get-pip.py | python2
  + curl --location --fail https://bootstrap.pypa.io/2.7/get-pip.py | python2
  python2 -m pip install --user --upgrade pip setuptools wheel
  