### 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
deselect();
				}
				remove_secondary_carets();
				set_caret_line(caret_row_tmp, true, false);
				set_caret_column(caret_column_tmp);
				insert_text_at_caret(p_data);
				end_complex_operation();
			}
		} else if (is_mouse_over_selection()) {
			remove_secondary_carets();
			caret_row_tmp = get_selection_from_line();
			caret_column_tmp = get_selection_from_column();
			set_caret_line(caret_row_tmp, true, false);
			set_caret_column(caret_column_tmp);
			insert_text_at_caret(p_data);
			grab_focus();
		} else {
			remove_secondary_carets();
			deselect();
			set_caret_line(caret_row_tmp, true, false);
			set_caret_column(caret_column_tmp);
			insert_text_at_caret(p_data);
			grab_focus();
		}
		if (caret_row_tmp != get_caret_line() || caret_column_tmp != get_caret_column()) {
			select(caret_row_tmp, caret_column_tmp, get_caret_line(), get_caret_column());
		}
	}
}
Control::CursorShape TextEdit::get_cursor_shape(const Point2 &p_pos) const {