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/SvcAttribute.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
+{
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    class SvcAttribute : Attribute
+    {
+        public int Id { get; }
+
+        public SvcAttribute(int id)
+        {
+            Id = id;
+        }
+    }
+}