Rollup merge of #143592 - ChrisDenton:uwp-link, r=Mark-Simulacrum

UWP: link ntdll functions using raw-dylib

Lazy loading isn't necessary so there's no need for the added complexity and overhead. However, it may be that people using UWP rust libraries don't have the necessary import libraries linked by Visual Studio so this uses raw-dylib, which allows linking to DLL functions without having an import library. This is a somewhat temporary situation as raw-dylib is intended to eventually be the default for all imports. When that happens, this special case can be removed.

Closes rust-lang/rust#143530

Author: fmease