[lldb] Make use of Scripted{Python,}Interface for ScriptedThreadPlan (#70392)

This patch makes ScriptedThreadPlan conforming to the ScriptedInterface
& ScriptedPythonInterface facilities by introducing 2
ScriptedThreadPlanInterface & ScriptedThreadPlanPythonInterface classes.

This allows us to get rid of every ScriptedThreadPlan-specific SWIG
method and re-use the same affordances as other scripting offordances,
like Scripted{Process,Thread,Platform} & OperatingSystem.

To do so, this adds new transformer methods for `ThreadPlan`, `Stream` &
`Event`, to allow the bijection between C++ objects and their python
counterparts.

Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>

lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedThreadPlanPythonInterface.h

@@ -0,0 +1,44 @@
+//===-- ScriptedThreadPlanPythonInterface.h ---------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_PLUGINS_SCRIPTINTERPRETER_PYTHON_INTERFACES_SCRIPTEDTHREADPLANPYTHONINTERFACE_H
+#define LLDB_PLUGINS_SCRIPTINTERPRETER_PYTHON_INTERFACES_SCRIPTEDTHREADPLANPYTHONINTERFACE_H
+
+#include "lldb/Host/Config.h"
+
+#if LLDB_ENABLE_PYTHON
+
+#include "ScriptedPythonInterface.h"
+#include "lldb/Interpreter/Interfaces/ScriptedThreadPlanInterface.h"
+#include <optional>
+
+namespace lldb_private {
+class ScriptedThreadPlanPythonInterface : public ScriptedThreadPlanInterface,
+                                          public ScriptedPythonInterface {
+public:
+  ScriptedThreadPlanPythonInterface(ScriptInterpreterPythonImpl &interpreter);
+
+  llvm::Expected<StructuredData::GenericSP>
+  CreatePluginObject(const llvm::StringRef class_name,
+                     lldb::ThreadPlanSP thread_plan_sp,
+                     const StructuredDataImpl &args_sp) override;
+
+  llvm::Expected<bool> ExplainsStop(Event *event) override;
+
+  llvm::Expected<bool> ShouldStop(Event *event) override;
+
+  llvm::Expected<bool> IsStale() override;
+
+  lldb::StateType GetRunState() override;
+
+  llvm::Expected<bool> GetStopDescription(lldb_private::Stream *s) override;
+};
+} // namespace lldb_private
+
+#endif // LLDB_ENABLE_PYTHON
+#endif // LLDB_PLUGINS_SCRIPTINTERPRETER_PYTHON_INTERFACES_SCRIPTEDTHREADPLANPYTHONINTERFACE_H