GPU: Implemented the depth buffer and depth test + culling

GPU: Fixed the index offset and implement BaseVertex when doing indexed rendering.

GPU: Remove unmapped surfaces from the rasterizer cache and fix our nvmap::Free behavior.

GPU: Directly copy the pixels when performing a same-layout DMA.

This fixes Stardew Valley.

GPU: Ignore invalid and disabled textures when drawing.

This behavior is confirmed by reverse engineering.

GPU: Corrected the size of the MUFU subop field, and removed incorrect "min" operation.

GPU: Implement the RGBA32_UINT rendertarget format.

gl_shader_decompiler: Implement predicate NotEqualWithNan.

Rewrite the OpenGL rasterizer cache

Service/Audio: add hwopus service, stub GetWorkBufferSize function

gl_rasterizer_cache: Improved cache management based on Citra's implementation.

gl_surface_cache: Add some docstrings.

gl_rasterizer: Workaround for when exceeding max UBO size.