[policy, no patch] Drop support for Windows in production in Drupal 11

As someone who did Drupal on Windows for about a decade: yes, please. It always felt like being a second class citizen, there was always something little going wrong that took extra time to figure out because nobody else was seeing it. But the sysadmin really liked his windows servers and it was supported so we stuck with it. Making official what is already essentially true seems like the right move here.

I have dealt with other people choices to run Drupal on Windows Servers - including Drupal 10.
Strongly in favour of dropping official support.

Since Microsoft and canonical invented the SSL it should be fully ok to drop windows support when wsl isn't used. Even PHP windows binaries will run down soon. Just because they are not needed anymore. Now we can use all that with a pretty stable walk layer.

Tested Windows + WSL + Debian 12 + Drupal CMS 1.0 today. It works perfectly.

Updated the IS with text to add to the System Requirements page.

English seems native. +1 RTBC

The text looks fine I think, but a lot of people run Drupal on OSX locally (even if that's docker-on-OSX and not homebrew or whatever people used to use 5-10 years ago) and it doesn't mention OSX at all, so it might need to somehow account for that? Not sure how though.

We also need to update https://www.drupal.org/docs/getting-started/system-requirements/web-serv... → to at least remove the IIS references

@catch, since this about Drupal on production sites it is necessary to bring up local development on OSX, or any other platform?

@quietone well we have this in the suggested text about local development environments on Windows and I'm not sure people reading it will make the distinction. We could completely remove the reference to local development maybe?

"Instead, use Linux on Windows. However, using Windows in a development environment is supported."