hle: kernel: Unify and integrate reference tracking for KServerPort/KServerSession.

- These are not managed elsewhere, and need to be tracked and closed on emulation shutdown.

src/core/hle/kernel/hle_ipc.cpp

@@ -59,6 +59,9 @@ bool SessionRequestManager::HasSessionRequestHandler(const HLERequestContext& co
 
 void SessionRequestHandler::ClientConnected(KServerSession* session) {
     session->ClientConnected(shared_from_this());
+
+    // Ensure our server session is tracked globally.
+    kernel.RegisterServerObject(session);
 }
 
 void SessionRequestHandler::ClientDisconnected(KServerSession* session) {