haxe: make neko optional temporarily

Deals with the confusion caused by the MMOSR in Neko upstream in [this
issue](https://github.com/HaxeFoundation/neko/issues/44).

Closes #34838.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
language/python: setup_install_args

Add a helper like std_cmake_args that returns the correct incantation
for invoking setup.py in a consistent way and with our preferred
arguments. Replaces setup_install.
hide python setup.py shim in Formula#system
ansible: use Language::Python.setup_install_args
formula: recognize setuptools shim and refurbish args
Formula#exec_cmd: uncompress refurbish args check
Language::Python.setup_install: add deprecation warning
ansible: update 1.8.2 bottle.