### Godot version

v4.0.beta.custom_build [fab9926a9]

### System information

Fedora 37

### Issue description

When creating a new inherited scene, saving the scene (for example with Ctrl+S) defaults to overwriting the scene being inherited, instead of prompting for a location to save to.

### Steps to reproduce

1. Create a new inherited scene
2. Press Ctrl+S

If the scene being inherited is imported (for example from a glTF), an error displays. If the inherited scene is a .tscn or .scn, it gets overridden by an inherited scene that tries to inherit itself, which is impossible and thus corrupt.

### Minimal reproduction project

N/A
int scene_idx = -1;
	for (int i = 0; i < editor_data.get_edited_scene_count(); i++) {
		if (editor_data.get_scene_path(i) == p_path) {
			scene_idx = i;
			break;
		}
	}
	int current_tab = editor_data.get_edited_scene();
	if (scene_idx == -1) {
		if (get_edited_scene()) {
			
			EditorUndoRedoManager::get_singleton()->clear_history(false, editor_data.get_current_edited_scene_history_id());
		}
		return;
	}
	if (current_tab == scene_idx) {
		editor_data.apply_changes_in_editors();
		_set_scene_metadata(p_path);
	}
	
	_remove_scene(scene_idx, false);
	load_scene(p_path, true, false, true, true);
	
	editor_data.move_edited_scene_to_index(scene_idx);
	EditorUndoRedoManager::get_singleton()->clear_history(false, editor_data.get_scene_history_id(scene_idx));
	
	scene_tabs->set_current_tab(current_tab);
}
void EditorNode::find_all_instances_inheriting_path_in_node(Node *p_root, Node *p_node, const String &p_instance_path, List<Node *> &p_instance_list) {