DAP: Add Python debugging

Added Python support to the DAP engine in Qt Creator.

Note:
Locals aren't displayed for python. It will be fixed
in the following commit.

Change-Id: I6d3b41fecc98b92951ed0522e9201401293034d7
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/dap/gdbdapengine.cpp

@@ -111,8 +111,6 @@ void GdbDapEngine::setupEngine()
 
     connectDataGeneratorSignals();
     m_dapClient->dataProvider()->start();
-
-    notifyEngineSetupOk();
 }
 
 } // namespace Debugger::Internal