To make it extra clear that this is measuring the XFB, not the EFB.

fb4ff3e put all the code for the show internal resolution setting right
next to the code for the show FPS setting, presumably because an earlier
version of that commit had them next to each other in the GUI. It makes
more conceptual sense to put the code next to the code for the show
statistics settings, matching what the GUI looks like now.

VideoCommon: Added option for showcasing internal resolution

Also incremented STATE_VERSION.

Accomplished using `run-clang-tidy` with `performance-move-const-arg,performance-unnecessary-value-param,modernize-pass-by-value`.

Changed arguments to const references, removed them where inappropriate (e.g. sink parameters). Same with std::move.

Manually reviewed each change to make sure that it makes sense, and do something more appropriate if possible.

HW/GBACore: Make GBAs always run on dedicated threads in preparation for future improvements.

GeneralPane: Change BETA to RELEASE in updater variable names