meso: fix longstanding bad asm copy-paste

kern: fix debug build for [[nodiscard]] changes

kern: pass u32 directly to CopyMemoryToUserSize32Bit

ams: mark ams::Result [[nodiscard]] (partially complete). ...

NOTE: This work is not yet fully complete; kernel is done, but
it was taking an exceedingly long time to get through libstratosphere.
Thus, I've temporarily added -Wno-error=unused-result for libstratosphere/stratosphere.

All warnings should be fixed to do the same thing Nintendo does as relevant, but this
is taking a phenomenally long time and is not actually the most important work to do,
so it can be put off for some time to prioritize other tasks for 21.0.0 support.

kern: move spendsgir static assert

kern: save/restore spendsgir in KInterruptController::Save/RestoreCoreLocal

kern: use KLightLock for KCoreBarrierInterruptHandler

kern: plutoo is an intellectual, I am a fool, fix chicanery

kern: use callback to note pte updates in KPageTableImpl

kern: adjust system registers during exception handling on MTE-violation or kernel address fault

kern: update UserspaceAccess functions for 20.0.0 changes

kern: update KernelLdr for 19.0.0 (new checks, dummy function call). ...

Also, fix a few very embarassing mistakes in kernel ldr:
* We have been mapping the page table region RWX for a few years now, accidentally.
* My attempt at making initial page tables not use bit 58 was broken in multiple ways.

kern: Perform page table validity pass during KPageTableImpl::InitializeForKernel

kern: fix more page table refactor bugs

kern: first round of page table refactor bug fixes

kern: update KPageTable::Map for new refactor

kern: update ChangePermissions to use new iteration logic

kern: update KPageTable::Finalize for the refactor

kern: use new merge pages api

kern: implement KPageTableImpl merge

kern: continue page table refactor, implement separate/unmap

kern: start KPageTable(Impl) refactor, use array-with-levels for KPageTableImpl

kern: invoke supervisor mode thread functions from C++ context with valid stack frame

kern/ldr: add support for --x executables

kern: fix debug build

kern: allocate all TTBR0 pages during init, use procidx as asid

kern: clear gicd/gicc pointers in KInterruptController::Finalize

kern/svc: update WaitForAddress to support 64-bit WaitIfEqual

kern/creport: use mod0 to locate symbol table for all modules

kern: return ExceptionType_UnalignedData on data abort caused by alignment fault