Log: Switch to enum class

Need to change the channel to a bitset too.. the string lookups are
horribly slow, and conflict when one is a prefix of another.

VulkanDevice: Add additional semaphore on swap chain

We don't actually need +1 semaphores, or, more than one really.
But, the validation layer gets cranky if we don't fence wait before the next image acquire.
So, add an additional semaphore to ensure that we're never acquiring before fence waiting.

System: Clear cheat list on reset

CPU/CodeCache: Fix page error when rewinding

SmallString: Add missing constructors/move operators

Merge pull request stenzek#3063 from zkdpower/master

update simple-chinese translation.

Merge pull request stenzek#3032 from kamfretoz/ikon-pt2

Qt: More icon overhaul and cleanup

Create windows-build.yml

Achievements: Don't call frame update when paused

But we still want to poll for requests.

CMake: Build tweaks