codec: Remove deprecated usage of AVCodecContext::refcounted_frames

This was only necessary for use with the
avcodec_decode_video2/avcoded_decode_audio4 APIs which are also
deprecated.

Given we use avcodec_send_packet/avcodec_receive_frame, this isn't
necessary, this is even indicated directly within the FFmpeg API changes
document here on 2017-09-26:

https://github.com/FFmpeg/FFmpeg/blob/master/doc/APIchanges#L410

This prevents our code from breaking whenever we update to a newer
version of FFmpeg in the future if they ever decide to fully remove this
API member.

node: Eliminate variable shadowing

vp9/vic: Resolve pessimizing moves

Kernel: Refactor to use 4-instances of Dynarmic & various cleanups and improvements

Prevents logic bugs from accidentally ignoring the return value.

mouse_input/mouse_poller: Minor cleanup

Removes the usage of moves that don't result in behavior different from
a copy, or otherwise would prevent copy elision from occurring.

Allows the struct to be constructed in place.

Removes the use of two static casts and improves the readability of some
vectors slightly.

audio_core: Make shadowing and unused parameters errors

Moves the audio code closer to enabling warnings as errors in general.

nvdec: Queue and display all decoded frames, cleanup decoders

InputCommon: Add multiple udp server support

InputCommon: Fix implicit conversion in mouse input

vk_shader_decompiler: Implement force early fragment tests

Disable web applet and warning box when compiling for Linux on CI

yuzu's web applet does not or barely reacts to user input while open in
Linux. It can be closed via 'Exit Web Applet' on the menubar, however if
yuzu is in fullscreen, this is effectively a softlock as the menubar
cannot be accessed.

This disables building yuzu with the web applet on the Linux CI target.
In addition, this disables the QMessageBox warning about not having
compiled yuzu with the web applet.

InputCommon: Implement full mouse support

common: Add Common::DivCeil and Common::DivCeilLog2

- This will be aligned by default, and helps memory usage.

hid: Check if applet_resource exists in InitializeVibrationDevice

Add missing types to NpadCommunicationMode

HID: Stub set and get NpadCommunicationMode

audio_core: Remove temp_mix_buffer