[vulkan] Fix TOTK dark squares (#4565)

Qualcomm and Turnip use different subpixel rounding for Vulkan texture
gather coordinates than the Switch's Maxwell GPU. This can select the
wrong texels near texture boundaries, producing large black squares in TOTK

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md).
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

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Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4565
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Shinmegumi <shinmegumi@eden-emu.dev>

0 files changed, 0 insertions, 0 deletions