This commit aims to help easing debugging of driver crashes without
having to modify existing code.

FS: Improve emulation of device saves

nv_flinger: Use enum for pixel format instead of u32

DmaPusher: Remove dead code in step

vk_rasterizer: Match OpenGL's FlushAndInvalidate behavior

Match OpenGL's behavior. This can fix or simplify bisecting issues on
Vulkan.

Frontend: Remove tracking for context wrapper

audio_renderer: Better voice mixing and 6 channel downmixing

Improve time zone support

shader_ir: Add separate instructions for ordered and unordered comparisons and fix NE on GLSL

vk_graphics_pipeline: Implement rasterizer_enable on Vulkan

Stub hid:SendKeyboardLockKeyEvent

Supersedes #3738 and #3321

Needed for Puchikon 4 SmileBASIC 1.0.0

CI: Don't check clang format on early access builds

"Not equal" operators on GLSL seem to behave as unordered when we expect
an ordered comparison.

Manually emulate this checking for LGE values (numbers, not-NaNs).

externals: Cmake version checks

texture: Implement R8G8UI

This allows us to use native SPIR-V instructions without having to
manually check for NAN.

maxwell_to_vk: implement missing signed int formats