### 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
if (pending_action_end) {
		start_action(EditAction::ACTION_NONE);
		return;
	}
	if (current_op.type == TextOperation::TYPE_NONE) {
		return; 
	}
	if (next_operation_is_complex) {
		current_op.chain_forward = true;
		next_operation_is_complex = false;
	}
	undo_stack.push_back(current_op);
	current_op.type = TextOperation::TYPE_NONE;
	current_op.text = "";
	current_op.chain_forward = false;
	if (undo_stack.size() > undo_stack_max_size) {
		undo_stack.pop_front();
	}
}
void TextEdit::_do_text_op(const TextOperation &p_op, bool p_reverse) {