Port #3474 from Citra: Do not crash on unimplemented code in debug build

Port #3505 from Citra: Fix QGLWidget viewport resize on macOS

gl_rasterizer: Flip triangles when regs.viewport_transform[0].scale_y is negative.

nvhost_ctrl: Fix NvOsGetConfigU32 for Snipper Clips.

- Fixes a regression with Binding of Isaac.

GPU: Implemented the IMNMX shader instruction.

GPU: Implemented the BC7U texture format.

Revert "Virtual Filesystem (#597)"

This reverts commit 77c684c1.

Port #3466 from Citra: Add link to Discord

Note: Our version of glad exports GL_COMPRESSED_RGBA_BPTC_UNORM as GL_COMPRESSED_RGBA_BPTC_UNORM_ARB, maybe it's time we update it.

externals: Update dynarmic to f7d11baa1

Remove some references to Citra

* Add VfsFile and VfsDirectory classes

* Finish abstract Vfs classes

* Implement RealVfsFile (computer fs backend)

* Finish RealVfsFile and RealVfsDirectory

* Finished OffsetVfsFile

* More changes

* Fix import paths

* Major refactor

* Remove double const

* Use experimental/filesystem or filesystem depending on compiler

* Port partition_filesystem

* More changes

* More Overhaul

* FSP_SRV fixes

* Fixes and testing

* Try to get filesystem to compile

* Filesystem on linux

* Remove std::filesystem and document/test

* Compile fixes

* Missing include

* Bug fixes

* Fixes

* Rename v_file and v_dir

* clang-format fix

* Rename NGLOG_* to LOG_*

* Most review changes

* Fix TODO

* Guess 'main' to be Directory by filename

GPU: Allow using the old NV04 values for the depth test function.

These seem to be just a valid as the GL token values. Thanks @ReinUsesLisp

This restores graphical output to Disgaea 5

GPU: Stub the shader SYNC and DEPBAR instructions.

GPU: Implemented the F2F 'round' rounding mode.

GPU: Implement the Size_16_16 and Size_10_10_10_2 vertex attribute types

GPU: Ignore unused textures and corrected the TEX shader instruction decoding.

GPU: Implemented the PSETP shader instruction.

GPU: Implemented the 32 bit float depth buffer format.

It's similar to the FMNMX instruction but it works on integers.

It's implemented via the GLSL 'roundEven()' function.

It is unknown at this moment if we actually need to do something with these instructions or if the GLSL compiler takes care of that for us.

Both signed and unsigned variants.

It's similar to the isetp and fsetp instructions but it works on predicates instead.

GPU: Flip the triangle front face winding if the GPU is configured to not flip the triangles.

OpenGL's default behavior is already correct when the GPU is configured to flip the triangles.

This fixes 1-2 Switch's splash screen.

GPU: Only configure the used framebuffers during clear.

Don't try to configure the color buffer if it is not being cleared, it may not be completely valid at this point.