Fix crash on exit if any modern particle callback is registered

All these smart pointers have to be cleared before the Lua state is closed. Ordinarily, we'd have a smart pointer to the Lua state defined earlier in LSI than these smart pointers, which would take care of destruction in the correct order, but tfw technical debt.

src/lua/LuaScriptInterface.cpp

@@ -4382,6 +4382,10 @@ LuaScriptInterface::~LuaScriptInterface() {
 		component_and_ref.second.Clear();
 		component_and_ref.first->owner_ref = component_and_ref.second;
 	}
+	luaChangeTypeHandlers.clear();
+	luaCreateAllowedHandlers.clear();
+	luaCreateHandlers.clear();
+	luaCtypeDrawHandlers.clear();
 	lua_el_mode_v.clear();
 	lua_el_func_v.clear();
 	lua_gr_func_v.clear();