Using a cross-platform glob implementation on all platforms

Hi internals, Following some discussion in [GH-15564] about providing a cross-platform glob implementation, I've done the work to make the implementation used on Windows (which is from OpenBSD) the default on all platforms. You can see it at [GH-18164]. CI is currently passing with this. The code change is pretty minimal beyond cleanup. There are some things that might need to be changed (i.e. if we want to support system glob implementations), but those can be put off the table. It does simplify some documentation concerns as well. I raise the question to internals to see if this should be done or if it's big enough to merit an RFC. Regards, Calvin [GH-18164]: https://github.com/php/php-src/pull/18164 [GH-15564]: https://github.com/php/php-src/pull/15564