Kernel: Move {Virtual,Physical}Address classes to the Memory directory

Author: https://github.com/supercomputer7
Commit: aaa1de7878
Pull-request: https://github.com/SerenityOS/serenity/pull/17604
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/kleinesfilmroellchen ✅

Kernel/Memory/RegionTree.h

@@ -10,8 +10,8 @@
 #include <AK/IntrusiveRedBlackTree.h>
 #include <Kernel/Locking/Spinlock.h>
 #include <Kernel/Memory/Region.h>
+#include <Kernel/Memory/VirtualAddress.h>
 #include <Kernel/Memory/VirtualRange.h>
-#include <Kernel/VirtualAddress.h>
 
 namespace Kernel::Memory {