Missing python pip (py3-pip) on AWS & GCP images

[juan-vg]

While py3-pip is installed for the Azure image, it's missing for AWS and GCP images. While I'm not sure about the need for GCP, to build AWS lambdas based on Python pip is required.

I'm currently studying the possibility to implement my own custom runner image to have more control over other packages, but since the official Azure one has this py3-pip installed, I believe all the images should.

[lorengordon]

I once upon a time had to figure out how to get pip installed also. I ended up with a before_init hook that runs this:

      - curl -sSL -o /tmp/get-pip.py https://bootstrap.pypa.io/get-pip.py
      - python3 -m venv /tmp/venv
      - . /tmp/venv/bin/activate
      - python3 /tmp/get-pip.py
      - pip --version