### 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)

popup_editor->hide();
	if (!popup_edited_item) {
		return;
	}
	if (popup_edited_item_col < 0 || popup_edited_item_col > columns.size()) {
		return;
	}
	TreeItem::Cell &c = popup_edited_item->cells.write[popup_edited_item_col];
	switch (c.mode) {
		case TreeItem::CELL_MODE_STRING: {
			c.text = p_text;
			
		} break;
		case TreeItem::CELL_MODE_RANGE: {
			c.val = p_text.to_float();
			if (c.step > 0) {
				c.val = Math::snapped(c.val, c.step);
			}
			if (c.val < c.min) {
				c.val = c.min;
			} else if (c.val > c.max) {
				c.val = c.max;
			}
			
		} break;
		default: {
			ERR_FAIL();
		}