Presentation context always has GL_DRAW_FRAMEBUFFER_BINDING as zero.
There is no need to bind the default framebuffer constantly.

According to Nsight this was using ~0.7ms per frame and it broke
renderdoc captures.

* fix LayeredFS error when loading some games made with the Unity

Silences a warning about control paths not all returning a value.

Credits go to gdkchan and Ryujinx. The pull request used for this can
be found here: https://github.com/Ryujinx/Ryujinx/pull/1082

yuzu was already using the header for interpolation, but it was missing
the FragCoord.w multiplication described in the linked pull request.
This commit finally removes the FragCoord.w == 1.0f hack from the shader
decompiler.

While we are at it, this commit renames some enumerations to match
Nvidia's documentation (linked below) and fixes component declaration
order in the shader program header (z and w were swapped).

https://github.com/NVIDIA/open-gpu-doc/blob/master/Shader-Program-Header/Shader-Program-Header.html

capsrv: Split Capture services into individual files and stub GetAlbumContentsFileListForApplication (#3571)

* Organize capture services into individual files

* Stub GetAlbumContentsFileListForApplication

* Address feedback

Fixes a potential edge case where cleared textures read from the CPU
were not flushed.

Co-Authored-By: Valentin Vanelslande <vvanelslandedev@gmail.com>

They were swapped.