Running the tests on windows currently fails for every gpui test using the `TestPlatform` with ```rs called `Result::unwrap()` on an `Err` value: CoInitialize has not been called. (0x800401F0) ``` trying to call `CoCreateInstance`in the `DirectWriteComponent`. The `WindowsPlatform` calls [`OleInitialize`](https://learn.microsoft.com/de-de/windows/win32/api/ole2/nf-ole2-oleinitialize) which internally calls `CoInitializeEx` so I just copied that to the `TestPlatform`. Release Notes: - N/A