common/misc: Deduplicate code in GetLastErrorMsg()

externals: Update Xbyak to 5.65

externals: Update catch to v2.2.3

file_util: return string by const reference for GetExeDirectory()

string_util: Remove AsciiToHex()

savedata_factory: Make SaveDataDescriptor's DebugInfo() function a const member function

partition_filesystem: Ensure all class members of PartitionFilesystem are initialized

content_archive: Minor changes

vfs: Deduplicate accumulation code in VfsDirectory's GetSize()

gl_state: Temporarily disable culling and depth test.

Android and macOS have supported thread_local for quite a while, but
most importantly is that we don't even really need it. Instead of using
a thread-local buffer, we can just return a non-static buffer as a
std::string, avoiding the need for that quality entirely.

Keeps the JIT assembler library up to date and ensures we don't run into
any issues that may have been resolved.

Keeps the unit-testing library up to date.

This disallows modifying the internal string buffer (which shouldn't be
modified anyhow).

externals: Update dynarmic to 5a91c94.

Easy TODO

address_arbiter: Correct assignment within an assertion statement in WakeThreads()

core/memory, core/hle/kernel: Use std::move where applicable

This function doesn't alter class state.

Previously is_hfs and pfs_header members wouldn't be initialized in the
constructor, as they were stored in locals instead. This would result in
things like GetName() and PrintDebugInfo() behaving incorrectly.

While we're at it, initialize the members to deterministic values as
well, in case loading ever fails.

There's no need to take this by value when it's possible to avoid
unnecessary copies entirely like this.

Gets rid of unnecessary atomic reference count incrementing and
decrementing.

We can just use a generic lambda to avoid writing the same thing twice.

service/prepo: Add missing header guard

externals: update fmt to version 5.1.0

vm_manager: Add missing commas to string literal array elements in GetMemoryStateName()

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 was introduced within 4f81bc4e, and
considering there's no comment indicating that this is intentional, this
is very likely a bug.

Without these, this would perform concatenation, which is definitely not
what we want here.