[Vulkan] Apply MK8D Buffer Fix to Linux (#4289)

- [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.

-------------------

Credit: MaranBR
- Adds the Rainbow Graphics Bug Fix to Linux as the game needs MAX_STREAM_BUFFER_SIZE = 256_MiB

![image](/attachments/722d4014-9449-47a0-be47-730b99e0b464)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4289
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: Samuel <lizzie@eden-emu.dev>

src/video_core/renderer_vulkan/vk_staging_buffer_pool.cpp

@@ -33,10 +33,10 @@ constexpr VkDeviceSize MAX_ALIGNMENT = 256;
 // Windows ones however, can intake bigger buffers and generally do not OOM.
 // - GTX 960 on Windows will not OOM with 256mib
 // - GT 1030 on ^NIX will OOM with 256mib
-#if defined(_WIN32) || defined(__ANDROID__)
-constexpr VkDeviceSize MAX_STREAM_BUFFER_SIZE = 256_MiB;
-#else
+#if defined(__FreeBSD__)
 constexpr VkDeviceSize MAX_STREAM_BUFFER_SIZE = 128_MiB;
+#else
+constexpr VkDeviceSize MAX_STREAM_BUFFER_SIZE = 256_MiB;
 #endif
 
 size_t GetStreamBufferSize(const Device& device) {