Support pulling artifacts from GitLab

[Girgias]

Ask discussed with @asgrim and @shivammathur in the latest PHP Foundation meeting, ext/csv is currently hosted on GitLab. And it would be nice to have a workflow to build a Windows DLL and have Pie be able to grab it and install it on Windows.

[shivammathur]

@Girgias @asgrim

Now php-windows-builder supports running it locally anywhere. So, I was able to add support to build Windows DLLs on GitLab.
https://gitlab.com/shivammathur/csv-php-extension/-/blob/ci/.gitlab-ci.yml

Currently the windows-shared runner that gitlab provides only has Visual Studio 17, so for PHP 8.0 to 8.3, it will install the required Visual Studio 16 components on each run and that takes around 10 minutes. So, unless you are on a paid plan, I would not recommend using GitLab for this.

[Girgias]

I mean, I am happy to just provide Windows binaries for 8.4/8.5 as I don't think there have been recent Windows DLLs at all. So if you mind submitting a merge request on GitLab to credit this (with a comment explaining why 8.0-8.3 is not supported) that's fine by me! :)