GH-104114: Fix `pathlib.WindowsPath.glob()` use of literal pattern segment case (GH-104116)

We now use `_WildcardSelector` to evaluate literal pattern segments, which
allows us to retrieve the real filesystem case.

This change is necessary in order to implement a *case_sensitive* argument
(see GH-81079) and a *follow_symlinks* argument (see GH-77609).