This commit disables the Boxcat backend by default for new users of yuzu.

There's several reasons as to why this is done:
1. Boxcat currently only actually has an impact on 3 games and doesn't influence any core mechanics of them
2. It causes a plethora of issues when enabled such as games like Crash Team Racing, Diablo 3 and Tales of Vesperia not booting at all or hanging
3. It causes https://github.com/yuzu-emu/yuzu/issues/2957 to happen. This makes the configuration menu totally unusable for many Linux users of yuzu

I think those points show that currently the negative impact of Boxcat outweighs its benefits and should therefore be disabled by default.
For users who are eager to use the extra features provided by it, they can still just turn it on in the settings.

renderer_opengl: Detect Nvidia Nsight as a debugging tool

Use getenv to detect Nsight.

vk_rasterizer: Fix vertex range assert

video_core: Implement RGBA16_SNORM

shader_decode: Reimplement BFE instructions

maxwell_to_vk: add vertex format eA2B10G10R10UnormPack32

renderer_opengl: Keep frames synchronized when using a GPU debugger.

vk_shader_decompiler: fix linux build

End can be equal to start in CalculateVertexArraysSize. This is quite
common when the vertex size is zero.

- Fixes renderdoc with OpenGL renderer.

PageTable: move backing addresses to a children class as the CPU page table does not need them.

texture_cache: Report incompatible textures as black

texture_cache/surface_params: Force depth=1 on 2D textures

video_core: Initial implementation of transform feedbacks

This PR aims to reduce the memory usage in the CPU page table by moving
GPU specific parameters into a child class. This saves 1Gb of Memory for
most games.

Use INSERT_UNION_PADDING_WORDS instead of alignas to ensure a size
requirement.

Co-Authored-By: Mat M. <mathew1800@gmail.com>

We sometimes have to slice attributes in different parts. This is needed
for example in instances where the game feedbacks 3 components but
writes 4 from the shader (something that is possible with
GL_NV_transform_feedback).

gl_shader_cache: Rework shader cache and store texture arrays

gl_rasterizer: Implement polygon modes and fill rectangles