Implement JIT Arm64 backend (#4114)

* Implement JIT Arm64 backend

* PPTC version bump

* Address some feedback from Arm64 JIT PR

* Address even more PR feedback

* Remove unused IsPageAligned function

* Sync Qc flag before calls

* Fix comment and remove unused enum

* Address riperiperi PR feedback

* Delete Breakpoint IR instruction that was only implemented for Arm64

ARMeilleure/IntermediateRepresentation/Multiplier.cs

@@ -5,6 +5,7 @@ namespace ARMeilleure.IntermediateRepresentation
         x1 = 0,
         x2 = 1,
         x4 = 2,
-        x8 = 3
+        x8 = 3,
+        x16 = 4
     }
 }