shader: remaining decode and emitter fixes

Decode and SPIR-V emitter corrections this title's shaders need: image and
memory operand handling, scalar ALU forms, and the IR plumbing that goes with
them.

src/graphics/shader/recompiler/backend/spirv/spirvEmitterImage.cpp

@@ -1,3 +1,5 @@
+#include <cinttypes>
+#include <atomic>
 #include "graphics/guest_gpu/gpu_format.h"
 #include "graphics/shader/recompiler/backend/spirv/spirvEmitterInternal.h"