Add Python 3 to more build machines

[cclauss]

Continue the process started in #1644 of putting both Python 2 and Python 3 on various build machines so that we can perform tests and experimental builds on the Python 3.
nodejs/node#25759 (comment)

/R = @rvagg

[cclauss]

On those build machines where Python 3 is already installed, we need to do:
python3 -m pip install --upgrade pipenv # See test failures on nodejs/node#25878

[refack]

Need to add to ansible recipes (https://github.com/nodejs/build/search?p=3&q=python&type=&utf8=%E2%9C%93)
Might be a good chance to refactor common prerequisites.

[cclauss]

Can we please get this resolves and closed? 303 daze left...

[rvagg]

some help getting ansible working properly with python3 would be great, I can't run it on my mac anymore for machines that need ccache and have to resort to linux where it uses python2. The line causing problems is https://github.com/nodejs/build/blob/master/ansible/roles/baselayout/tasks/ccache.yml#L13 and there's a similar one in ansible/roles/jenkins-worker/tasks/partials/docker-host.yml.
Something about jinja2 processing of "{{ ccache_html_content.stdout | regex_findall('ccache-[0-9]+.[0-9]+(?:.[0-9]+)*.tar.gz') | map('regex_replace', 'ccache-') | map('regex_replace', '.tar.gz') | list | latest_version }}" the chaining of the maps seems to be the problem and I don't have the error at hand. If needed I could probably generate the error again.

[refack]

@rvagg does #1399 help?

(BTW this has the new "npm" like pipenv work flow, git fetch, pipenv install, pipenv shell)

[cclauss]

Should we close this one or is this still an issue?

[refack]

We still need Python3 on more machines.