Adds {h264_,vp9_}{nvdec,vdpau} hwaccels.

Allows the use of VAAPI gpu decoders on system installed ffmpeg as well.

Supplements the VAAPI intel gpu decoder by implementing the D3D11VA decoder for Windows, and CUVID/VDPAU for Nvidia and AMD on drivers linux respectively.

settings: Fix MSVC issues

According to https://stackoverflow.com/questions/469508, we run into a
MSVC bug (since VS 2005) when using diamond inheritance for
RangedSetting.

This explicitly implements those functions in RangedSetting. GetValue is
implemented as just calling the inherited version. The explicit
converson operator is reimplemented. I opted for this over ignoring the
warning with a pragma since this specifies the inherited behavior, and I
have now less faith in MSVC to pick the right one.

In addition, we mark destructors as virtual to silence what I believe is
a fair MSVC compilation error.

settings: Implement settings ranges

texture_cache: Split out template definitions

main: Avoid stopping emulation when taking a screenshot

memory: Clean up code

configure_general: Swap positions of speed limit and frame limit options

vp9: Ensure the first frame is complete

yuzu-cmd/CMakeLists: Correct attribution for this function.

Silences a runtime error due to the first frame missing the frame data, and being set to hidden despite being a key-frame.

Respect Vulkan bufferImageGranularity

input_common: Improve SDL joystick and hide toggle option

Add description to fast gpu time option

common: uuid: Add hash function for UUID

nvdec: Better logging for unimplemented codecs

yuzu-cmd: hide mouse cursor when started fullscreen

settings_ui: Add emulated joystick position dot to controller preview

astc_decoder: Various performance and memory optimizations

nvdec: Fix VP9 reference frame refreshes

This was mainly used to keep track of mapped buffers for later unmapping.  Since unmap is no longer implemented, this no longer seves a valuable purpose.

With reference frames refreshes fix, we no longer need to buffer two frames in advance.
We can also remove other unused or otherwise unneeded variables.

This resolves the artifacting when decoding VP9 streams.

Skip unmapping nvdec buffers to avoid breaking the continuity of the VP9 reference frame addresses, and the risk of invalidating data before the async GPU thread is done with it.

assert: Avoid empty macros

Used when UUID is a key in an unordered_map. The hash is produced by XORing the high and low 64-bits of the UUID together.