Rewrite SVC handler using source generators rather than IL emit (#3371)

* Implement syscall handlers using a source generator

* Copy FlushProcessDataCache implementation to Syscall since it was only implemented on Syscall32

* Fix wrong argument order in some syscalls

* Delete old Reflection.Emit based syscall handling code

* Improvements to the code generation

* ControlCodeMemory address and size is always 64-bit

Ryujinx.HLE/HOS/Kernel/SupervisorCall/PointerSizedAttribute.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
+{
+    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = true)]
+    class PointerSizedAttribute : Attribute
+    {
+    }
+}