Replace glutin by winit + surfman 0.2
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This PR updates surfman to 0.2, and replaces glutin with winit+surfman.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because this should all be invisible
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306e8ac5f9