feat: add Low GPU Accuracy setting for maximum performance

Implements a new "Low" GPU accuracy level that prioritizes performance
over accuracy by aggressively cutting corners in GPU emulation.

Changes:
- Add GpuAccuracy::Low enum and setting infrastructure
- Implement IsGPULevelNormal() helper function
- Skip texture cache checks and query operations
- Use unsafe memory reads for DMA operations
- Disable fence delays and query precision
- Add UI support for desktop (Qt) and Android

Performance optimizations:
- Skips texture cache coherency checks (vk/gl_rasterizer.cpp)
- Non-blocking query synchronization (query_cache.h)
- Unsafe memory operations (dma_pusher.cpp)
- No macro parameter refresh (maxwell_3d.cpp)
- Immediate fence signaling (fence_manager.h)
- Non-precise Vulkan queries (vk_query_cache.cpp)

Ideal for lower-end hardware and users prioritizing FPS over accuracy.
Works on both desktop and Android platforms.

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -545,7 +545,8 @@ bool RasterizerOpenGL::MustFlushRegion(DAddr addr, u64 size, VideoCommon::CacheT
             return true;
         }
     }
-    if (!Settings::IsGPULevelHigh()) {
+    if (!Settings::IsGPULevelNormal()) {
+        // Skip texture cache checks for Low accuracy - ultimate performance
         return false;
     }
     if (True(which & VideoCommon::CacheType::TextureCache)) {
@@ -740,7 +741,8 @@ bool RasterizerOpenGL::AccelerateConditionalRendering() {
         // Reimplement Host conditional rendering.
         return false;
     }
-    // Medium / Low Hack: stub any checks on queries written into the buffer cache.
+    // Normal / Low Hack: stub any checks on queries written into the buffer cache.
+    // Low accuracy: Always stub for maximum performance
     const GPUVAddr condition_address{maxwell3d->regs.render_enable.Address()};
     Maxwell::ReportSemaphore::Compare cmp;
     if (gpu_memory->IsMemoryDirty(condition_address, sizeof(cmp),