Switch winapi dependencies to windows/windows-sys

[atouchet]

The winapi crate no longer appears to be maintained and there are now official windows/windows-sys crates from Microsoft. As such Servo should probably transition from using winapi to windows/windows-sys.

Dependencies to update:

Servo crates:

• servo_allocator (https://github.com/servo/servo/pull/32516)
• servoshell (https://github.com/servo/servo/pull/32516)

Servo organization crates:

• dwrote (https://github.com/servo/dwrote-rs/issues/51)
• font-kit (https://github.com/servo/font-kit/issues/228)
• harfbuzz-sys (https://github.com/servo/rust-harfbuzz/issues/256, https://github.com/servo/rust-harfbuzz/pull/257)
• surfman (https://github.com/servo/surfman/issues/292, https://github.com/servo/surfman/pull/298)
• webxr (https://github.com/servo/webxr/issues/228)

Third party crates:

• compiletest_rs (https://github.com/Manishearth/compiletest-rs/pull/290)
• d3d12 (https://github.com/gfx-rs/wgpu/issues/3207, https://github.com/gfx-rs/wgpu/pull/5956)
• dirs-sys-next (https://github.com/xdg-rs/dirs/pull/62, https://github.com/xdg-rs/dirs/pull/64)
• libloading (https://github.com/nagisa/rust_libloading/issues/118, https://github.com/nagisa/rust_libloading/pull/120)
• miow (https://github.com/yoshuawuyts/miow/pull/50)
• term (https://github.com/Stebalien/term/issues/114, https://github.com/Stebalien/term/pull/115)
• time (https://github.com/time-rs/time/pull/326, https://github.com/time-rs/time/issues/609)
• wgpu-hal (https://github.com/gfx-rs/wgpu/issues/3207, https://github.com/gfx-rs/wgpu/pull/5956)
• wio

[atouchet]

Servo's internal crates were switched from winapi to windows-sys in #32516.

[MarijnS95]

Fwiw a draft PR for wgpu is now up at https://github.com/gfx-rs/wgpu/pull/5956. Still needs a bit of refactoring to resolve the "more strict" API (i.e. missing Result checks), and to convert the WGL implementation.