ams: various fixes to support booting debug configuration

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: support reboot to fatal error on mariko

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: specify allowable ipc client memory attr via inverted-whitelist, not blacklist

kern: add minimum alignment support to KMemoryManager

kern/ldr: add support for --x executables

kern/strat: update for new DebugFlags capability semantics

kern: simplify KProcess max memory calculation

kern: move KTargetSystem into .rodata, split init/verify

kern: fix debug build

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

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

kern: eliminate use of KMemoryInfo, shuffle KMemoryBlock fields

kern: KAddressSpaceInfo now takes CreateProcessFlags in getters

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

kern: add InfoType_TransferMemoryHint

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

kern: fix using memory config for half-of-true-size

kern: fix whoops in new page table logic