[PSDK][NDK] winternl.h, iotypes.h: define PIO_APC_ROUTINE_DEFINED (#8417)

Define `PIO_APC_ROUTINE_DEFINED` after the `PIO_APC_ROUTINE` callback
type definition. Used by icmpapi.h `Icmp*SendEcho2*()` routines.

sdk/include/ndk/iotypes.h

···
     _In_ PIO_STATUS_BLOCK IoStatusBlock,
     _In_ ULONG Reserved);
 
+#define PIO_APC_ROUTINE_DEFINED
+
 //
 // Mailslot IOCTL Codes
 //

sdk/include/psdk/winternl.h

···
     _In_ PIO_STATUS_BLOCK IoStatusBlock,
     _In_ ULONG Reserved);
 
+#define PIO_APC_ROUTINE_DEFINED
+
 __kernel_entry
 NTSYSCALLAPI
 NTSTATUS