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/Native/JitSupportDarwin.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+namespace ARMeilleure.Native
+{
+    [SupportedOSPlatform("macos")]
+    public static partial class JitSupportDarwin
+    {
+        [LibraryImport("libarmeilleure-jitsupport", EntryPoint = "armeilleure_jit_memcpy")]
+        public static partial void Copy(IntPtr dst, IntPtr src, ulong n);
+    }
+}