Fixes the AArch64 JIT

Moves it to the new IR iterating style.
Forgot to clear icache after generation.
Fixes overly aggressive struct packing causing a fault

include/FEXCore/Debug/InternalThreadState.h

@@ -38,7 +38,7 @@ namespace FEXCore::Core {
     uint64_t RunCount; ///< Number of times this block of code has been run
   };
 
-  struct __attribute__((packed)) InternalThreadState {
+  struct InternalThreadState {
     FEXCore::Core::ThreadState State;
 
     FEXCore::Context::Context *CTX;