### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
remove_caret(second_caret);
				caret_edit_order = get_caret_index_edit_order();
				i--;
			}
			continue;
		}
		
		if (has_selection(second_caret)) {
			if (get_caret_line(first_caret) >= get_selection_from_line(second_caret) && get_caret_line(first_caret) <= get_selection_to_line(second_caret) && (get_caret_line(first_caret) > get_selection_from_line(second_caret) || get_caret_column(first_caret) >= get_selection_from_column(second_caret)) && (get_caret_line(first_caret) < get_selection_to_line(second_caret) || get_caret_column(first_caret) <= get_selection_to_column(second_caret))) {
				remove_caret(first_caret);
				caret_edit_order = get_caret_index_edit_order();
				i--;
			}
			continue;
		}
		
		if (get_caret_line(first_caret) == get_caret_line(second_caret) && get_caret_column(first_caret) == get_caret_column(second_caret)) {
			
			if (first_caret < second_caret) {
				remove_caret(first_caret);
			} else {
				remove_caret(second_caret);
			}
			i--;
			caret_edit_order = get_caret_index_edit_order();
			continue;
		}
	}
}
int TextEdit::get_caret_count() const {