TerminalRunner: Connect to QtcProcess::done() signal

Instead of connecting to errorOccurred() and finished() signals.

Change-Id: I3c96c61fab4dd23e75b773d6347eb3aa62ce3dd0
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/terminal.h

@@ -85,7 +85,7 @@ private:
     void stop() final;
 
     void stubStarted();
-    void stubError();
+    void stubDone();
 
     Utils::QtcProcess *m_stubProc = nullptr;
     std::function<ProjectExplorer::Runnable()> m_stubRunnable;