### Godot version

4.2 Stable

### System information

Linux

### Issue description

Calling TreeItem set_text() on a TreeItem that was removed via remove_child() causes debugging to end and the application to close without any error message.

### Steps to reproduce

Run the included example to get the debugger to crash. Comment out "treeItem.remove_child(subTreeItem)" for normal behaviour. 

### Minimal reproduction project

[treeItemCrash.zip](https://github.com/godotengine/godot/files/13534005/treeItemCrash.zip)

bool bring_up_editor = allow_reselect ? (c.selected && already_selected) : c.selected;
		String editor_text = c.text;
		switch (c.mode) {
			case TreeItem::CELL_MODE_STRING: {
				
				if (select_mode == SELECT_MULTI && (get_viewport()->get_processed_events_count() == focus_in_id || !already_cursor)) {
					bring_up_editor = false;
				}
			} break;
			case TreeItem::CELL_MODE_CHECK: {
				bring_up_editor = false; 
				if (force_edit_checkbox_only_on_checkbox) {
					if (x < theme_cache.checked->get_width()) {
						p_item->set_checked(col, !c.checked);
						item_edited(col, p_item, p_button);
					}
				} else {
					p_item->set_checked(col, !c.checked);
					item_edited(col, p_item, p_button);
				}
				click_handled = true;
				
			} break;
			case TreeItem::CELL_MODE_RANGE: {
				if (!c.text.is_empty()) {
					
					popup_menu->clear();
					for (int i = 0; i < c.text.get_slice_count(","); i++) {
						String s = c.text.get_slicec(',', i);