core/memory: Remove unused function GetSpecialHandlers() and an unused variable in ZeroBlock()

 core: Don't construct instance of Core::System, just to access its live instance

decoders: Fix calc of swizzle image_width_in_gobs.

hle/filesystem: Amend trace log in OpenSaveData() to compile in debug mode

game_list: Make ContainsAllWords an internally linked non-member function

* Virtual Filesystem

* Fix delete bug and documentate

* Review fixes + other stuff

* Fix puyo regression

This makes it a compilation error to construct additional instances of
the System class directly, preventing accidental wasteful constructions
over and over.

This would result in a lot of allocations and related object
construction, just to toss it all away immediately after the call.

These are definitely not intentional, and it was intended that all of
these should have been accessing the static function GetInstance()
through the name itself, not constructed instances.

Previously this wouldn't compile, since no such function named
SaveStructDebugInfo() exists.

Touchscreen Support

This function actually depends on no internal class state, so it doesn't
even need to be a part of the class interface.

 game_list: Make containsAllWords a const member function 

Telemetry: Minor changes

game_list: Remove unnecessary QString initialization in KeyReleaseEater

astc: Minor changes

We can just take the value parameter by value which allows both moving
into it, and copies at the same time, depending on the calling code.

These operators don't modify internal class state, so they can be made
const member functions. While we're at it, drop the unnecessary inline
keywords. Member functions that are defined in the class declaration are
already inline by default.

Implement buffer cropping and default to handheld mode

This provides the equivalent behavior, but without as much boilerplate.
While we're at it, explicitly default the move constructor, since we
have a move-assignment operator defined.

This makes it consistent with most of the other private utility
functions.

This doesn't actually modify the internal class state, so it can be a
const member function. While we're at it, amend the function to take
its arguments by const reference.

QString initializes to an empty string by default, so this does nothing
meaningful. While we're at it, use a constructor initializer list for
initializing the gamelist member variable.

There's no need to perform a separate resize.

A few member functions didn't actually modify class state, so these can
be amended as necessary.

This also potentially avoids warnings, considering the copy assignment
operator is supposed to have a return value.

GPU: Added register definitions for the stencil parameters.

scheduler: Clear exclusive state when switching contexts

svc:: Fix bug in svcWaitForAddress