nvdrv: Remove useless re-declaration of pure virtual methods that were already declared in the superclass

boxcat: Avoid unnecessary object copy

renderer_vulkan: Add missing `override` specifier

video_core: Resolve more variable shadowing scenarios pt.3

Fix "explicitly defaulted but implicitly deleted" warning

`PhysicalCore`'s move assignment operator was declared as `= default`,
but was implicitly deleted because `PhysicalCore` has fields
of reference type.  Switch to explicitly deleting it to avoid a Clang
warning.

The move *constructor* is still defaulted, and is required to exist due
to the use of `std::vector<PhysicalCore>`.

video_core: Adjust `NUM` macro to avoid Clang warning

nvdrv: Remove useless re-declaration of pure virtual methods that were already declared in the superclass

The previous definition was:

    #define NUM(field_name) (sizeof(Maxwell3D::Regs::field_name) / sizeof(u32))

In cases where `field_name` happens to refer to an array, Clang thinks
`sizeof(an array value) / sizeof(a type)` is an instance of the idiom
where `sizeof` is used to compute an array length.  So it thinks the
type in the denominator ought to be the array element type, and warns if
it isn't, assuming this is a mistake.

In reality, `NUM` is not used to get array lengths at all, so there is no
mistake.  Silence the warning by applying Clang's suggested workaround
of parenthesizing the denominator.

yuzu_cmd: Remove 'users_size'

maxwell_dma: Rename RenderEnable::Mode::FALSE and TRUE to avoid name conflict

Port citra-emu/citra#5577: "Update cubeb and request a persistent stream session"

xbyak_abi: Avoid implicit sign conversions

game_list_p: Resolve deprecated usage of QVariant operator<

On Apple platforms, FALSE and TRUE are defined as macros by
<mach/boolean.h>, which is included by various system headers.

Note that there appear to be no actual users of the names to fix up.

Specifically:

    const auto size = sdl2_config->GetInteger("System", "users_size", 0);

The variable is never used, producing a warning.  I wondered if this
ought to be assigning something to in `Settings`, but nothing else in
the codebase ever mentions a setting called "users_size", so I guess
it's safe to remove...

Cleans out the rest of the occurrences of variable shadowing and makes
any further occurrences of shadowing compiler errors.

This is designated as obsolete in Qt's docs (see:
https://doc.qt.io/qt-5/qvariant-obsolete.html#operator-lt)

video_core: Resolve more variable shadowing scenarios pt.2

Migrates the video core code closer to enabling variable shadowing
warnings as errors.

This primarily sorts out shadowing occurrences within the Vulkan code.

video_core: Resolve more variable shadowing scenarios

Port citra-emu/citra#5617: "Fix telemetry-related exit crash from use-after-free"

Makes for less reading.

system_version: Update to 11.0.0

Co-Authored-By: xperia64 <xperia64@users.noreply.github.com>

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.

Resolves variable shadowing scenarios up to the end of the OpenGL code
to make it nicer to review. The rest will be resolved in a following
commit.

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.