Don't use deprecated `GetVersionEx()`

Description

We're using GetVersionEx() to set EG(windows_version_info), and also GetVersion() in php_get_uname() (the latter might reuse the former; I'll have a closer look). Both functions are deprecated, and the documentation states:

GetVersionExA may be altered or unavailable for releases after Windows 8.1. Instead, use the Version Helper functions.

Using the version helper functions in combination with GetProductInfo() is indeed an option, but changing EG(windows_version_info) to no longer hold an OSVERSIONINFOEX structure would be a BC break, which is exacerbated by the fact that we make the fields available as userland constants:

https://github.com/php/php-src/blob/10ccb6bf0d4593e7250ac699addf31deee82caa0/main/main.stub.php#L193-L232

Either we find a way to populate the (relevant) fields of OSVERSIONINFOEX without calling any deprecated functions, or we may consider to deprecate some of the userland constants. Maybe we should do both.

Individuare il codice specifico per Windows che valorizza EG(windows_version_info) e la chiamata a GetVersion() utilizzata da php_get_uname(), quindi confrontarli con le costanti dichiarate in main/main.stub.php. Determinare se i campi rilevanti di OSVERSIONINFOEX possano rimanere compatibili senza API deprecate o se sia necessario deprecare le costanti userland interessate; il lavoro è completato quando la decisione sulla compatibilità è documentata ed entrambe le chiamate deprecate sono state gestite.