In #8649 we added some code to trick pynsist and make it understand that `abi3` wheels for Windows are forward compatible, meaning that the cryptography wheel tagged `cp36-abi3` is in fact compatible with Python 3.6+, and not only Python 3.6.
Since pynsist 2.7 the tool now understand `abi3` wheels properly, and this trick is not needed anymore.
Please note that despite modifying the pynsist pinning in `dev_constraints.txt`, it will have no effect since pynsist currently escape the pinning system. This is handled in https://github.com/certbot/certbot/pull/8749.
* Pin pynsist
* Update dependencies
* Set windows installer a proper python project
* Optimize usage of the venvs
* Add windows-installer when venv is set up
* Fix call
* Remove env marker
