shader_ir: Fix regression on TLD4

Originally on the last commit I thought TLD4 acted the same as TLD4S and 
didn't have a mask. It actually does have a component mask. This commit 
corrects that.

shader_ir: Fix TLD4 and add bindless variant

This commit fixes an issue where not all 4 results of tld4 were being
written, the color component was defaulted to red, among other things.
It also implements the bindless variant.

kernel/scheduler: Minor changes

gl_state: Miscellaneous clean up

rasterizer_accelerated: Add intermediary for GPU rasterizers

savedata_factory: Automatically create certain savedata

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

This requires removing constness from some methods, but for consistency
it's removed in all methods.

OpenGL has defaults values we can trust. Remove these.

maxwell_3d: Remove unused entries

externals: Track upstream opus

video_core: Implement texture format E5B9G9R9_SHAREDEXP.

This is only compared against, so it can be made const.

Reduces the overall amount of code.

Adjusts the formatting of a few of the comments an ensures they get
recognized as proper Doxygen comments.

Kernel: Implement a New Thread Scheduler V2

This commit implements the E5B9G9R9 Texture format into the general 
system and OpenGL backend.

maxwell_3d: Silence implicit conversion warnings

While we are at it, unify types for dirty reg pointers.

astc: Silence implicit conversion warnings

Add an intermediary class that implements common functions across GPU
accelerated rasterizers. This avoids code repetition on different
backends.

Implement Fast BRX, fix TXQ and addapt the Shader Cache for it

shader_ir: Use std::array with std::pair instead of std::unordered_map

Shader_Ir: Fix TLD4S from using a component mask.