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.

[cclauss]

Can we track progress in a table similar to the one below?

Operating System	Architectures	Versions	Python 2	Python 3
GNU/Linux	x64	kernel >= 3.10, glibc >= 2.17	Tests pass	Tests pass
GNU/Linux	x64	kernel >= 3.10, musl >= 1.1.19	Tests pass	Tests fail
GNU/Linux	x86	kernel >= 3.10, glibc >= 2.17	Tests pass	Not installed
GNU/Linux	arm64	kernel >= 4.5, glibc >= 2.17	Tests pass	Not installed
GNU/Linux	armv7	kernel >= 4.14, glibc >= 2.24	Tests pass	Not installed
GNU/Linux	armv6	kernel >= 4.14, glibc >= 2.24	Tests pass	Not installed
GNU/Linux	ppc64le >=power8	kernel >= 3.13.0, glibc >= 2.19	Tests pass	Not installed
GNU/Linux	s390x	kernel >= 3.10.0, glibc >= 2.17	Tests pass	Not installed
Windows	x64, x86 (WoW64)	>= Windows 7/2008 R2/2012 R2	Tests pass	Not installed
Windows	x86 (native)	>= Windows 7/2008 R2/2012 R2	Tests pass	Not installed
Windows	arm64	>= Windows 10	Tests pass	Not installed
macOS	x64	>= 10.12	Tests pass	Not installed
SmartOS	x64	>= 18	Tests pass	Not installed
AIX	ppc64be >=power7	>= 7.1 TL05	Tests pass	Not installed
FreeBSD	x64	>= 11	Tests pass	Not installed

[sam-github]

Is #1674 (comment) needed on the AIX machines? If so, after updating them all to have python3 available, #1775 (comment), I could do it.