### Godot version

v4.1.rc1.official [1f9e540f1]

### System information

Windows 10

### Issue description

Attempting to reorder the children of a TabContainer results in an unintended ordering and incorrect undo states.

Also happens in v4.0.3.stable.official [5222a99f5].

https://github.com/godotengine/godot/assets/3820082/2c2458e3-88ad-46d9-8a04-f289a049984a



### Steps to reproduce

1. Add a new TabContainer
2. Add a few children to it
3. Drag and drop to erroneously reorder them
4. Attempt to undo the change

### Minimal reproduction project

N/A
if (_is_any_processing()) {
		_add_to_process_thread_group();
	}
	data.process_thread_group_owner = p_owner;
	if (p_owner != nullptr) {
		data.process_group = p_owner->data.process_group;
	} else {
		data.process_group = &data.tree->default_process_group;
	}
	for (KeyValue<StringName, Node *> &K : data.children) {
		if (K.value->data.process_thread_group != PROCESS_THREAD_GROUP_INHERIT) {
			continue;
		}
		K.value->_add_to_process_thread_group();
	}
}
bool Node::is_processing_internal() const {