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

mouse_input/mouse_poller: Minor cleanup

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

It's unused and doesn't need to be initialized

tests: Fix warning about comparison between signed and unsigned

core: Reduce string copies in GetGameFileFromPath()

CMakeLists: disable -Winvalid-offsetof

This Clang warning complains when offsetof is used on a
non-standard-layout type (i.e. any class using various C++ features),
even though it works fine (and is not undefined behavior as of C++17).

core: Eliminate remaining usages of the global system instance