### 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
ERR_FAIL_COND(p_caret > carets.size());
	begin_complex_operation();
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (const int &i : caret_edit_order) {
		if (p_caret != -1 && p_caret != i) {
			continue;
		}
		if (!has_selection(i)) {
			continue;
		}
		selecting_mode = SelectionMode::SELECTION_MODE_NONE;
		_remove_text(get_selection_from_line(i), get_selection_from_column(i), get_selection_to_line(i), get_selection_to_column(i));
		set_caret_line(get_selection_from_line(i), false, false, 0, i);
		set_caret_column(get_selection_from_column(i), i == 0, i);
		carets.write[i].selection.active = false;
		adjust_carets_after_edit(i, carets[i].selection.from_line, carets[i].selection.from_column, carets[i].selection.to_line, carets[i].selection.to_column);
	}
	end_complex_operation();
	queue_redraw();
}
void TextEdit::set_line_wrapping_mode(LineWrappingMode p_wrapping_mode) {